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Bundle of nerve fibers (axons) connecting nuclei of the central nervous system
A nerve tract is a bundle of nerve fibers (axons) connecting nuclei of the central nervous system. In the peripheral nervous system, this is known as a
Nerve_tract
Sensory pathway from the skin to the thalamus
The spinothalamic tract is a nerve tract in the anterolateral system in the spinal cord. This tract is an ascending sensory pathway to the thalamus. From
Spinothalamic_tract
Long projection on a neuron that conducts signals to other neurons
a nerve tract in the central nervous system, and a fascicle in the peripheral nervous system. In placental mammals, the largest white matter tract in
Axon
Part of the vertebral column in animals
white matter tracts containing sensory and motor axons. Internal to this peripheral region is the grey matter, which contains the nerve cell bodies arranged
Spinal_cord
Nerve tract in humans
spinocerebellar tracts are nerve tracts originating in the spinal cord and terminating in the same side (ipsilateral) of the cerebellum. The two main tracts are the
Spinocerebellar_tracts
Cranial nerve connecting the eye to the brain
and continues as the optic tract to the lateral geniculate nucleus, pretectal nuclei, and superior colliculus. The optic nerve has been classified as the
Optic_nerve
White matter tract connecting the two cerebral hemispheres
callosum (Latin for "tough body"), or callosal commissure, is a wide, thick nerve tract, consisting of a flat bundle of commissural fibers, located beneath the
Corpus_callosum
Main nerve of the parasympathetic nervous system
including the heart, lungs, and digestive tract. As a key part of the parasympathetic nervous system, the vagus nerve helps regulate essential involuntary
Vagus_nerve
Connection formed between neurons that allows neurotransmission
Neurons are connected by a single axon, or by a bundle of axons known as a nerve tract, or fasciculus. Shorter neural pathways are found within grey matter
Neural_pathway
Cable-like bundle of axons
central nervous system, the analogous structures are known as nerve tracts. Each nerve is covered on the outside by a dense sheath of connective tissue
Nerve
Cranial nerve responsible for the face's senses and motor functions
the trigeminal nerve (lit. triplet nerve), also known as the fifth cranial nerve, cranial nerve V, or simply CN V, is a cranial nerve responsible for
Trigeminal_nerve
Nerve cell sending impulse to muscle
areas. Nerve tracts are bundles of axons as white matter, that carry action potentials to their effectors. In the spinal cord these descending tracts carry
Motor_neuron
Neural tract in the central nervous system
The vestibulospinal tract is a nerve tract in the central nervous system. Specifically, it is a component of the extrapyramidal system and is classified
Vestibulospinal_tract
Neural pathway within the human visual system
neuroanatomy, the optic tract (from Latin tractus opticus) is a part of the visual system in the brain. It is a continuation of the optic nerve that relays information
Optic_tract
Central nervous system pathways
The pyramidal tracts include both the corticobulbar tract and the corticospinal tract. These are aggregations of efferent nerve fibers from the upper
Pyramidal_tracts
Topics referred to by the same term
usually of a political or religious nature Tract (liturgy), a component of Roman Catholic liturgy Treatise Nerve tract, a bundle of fibers that connects different
Tract
Bundle of funiculi (small bundles of axons) in the peripheral nervous system
are known as nerve tracts. A nerve fascicle is enclosed by perineurium, a layer of fascial connective tissue. Each nerve fiber in the nerve fascicle is
Nerve_fascicle
Network of nerve fibres
the gastrointestinal tract Meissner's plexus (submucosal plexus) – serves the gastrointestinal tract Pharyngeal plexus of vagus nerve – serves the palate
Nerve_plexus
Nerve tract from the cingulate gyrus to the entorhinal cortex in the brain
neuroanatomy, the cingulum or cingulum bundle is an association tract, a nerve tract that projects from the cingulate gyrus to the entorhinal cortex in
Cingulum_(brain)
3D visualization of nerve tracts via diffusion MRI
tractography is a 3D modeling technique used to visually represent nerve tracts using data collected by diffusion MRI. It uses special techniques of
Tractography
Neuroscience field
The formation of a nerve tract follows several basic rules. In both invertebrate and vertebrate nervous systems initial nerve tracts are formed by the
Axon_guidance
Cranial nerve VI, for eye movements
The abducens nerve or abducent nerve, also known as the sixth cranial nerve, cranial nerve VI, or simply CN VI, is a cranial nerve in humans and various
Abducens_nerve
Nerves that emerge directly from the brain
trigeminal nerve (V), abducens nerve (VI), facial nerve (VII), vestibulocochlear nerve (VIII), glossopharyngeal nerve (IX), vagus nerve (X), accessory nerve (XI)
Cranial_nerves
The hypothalamospinal tract is an unmyelinated non-decussated descending nerve tract that arises in the hypothalamus and projects to the brainstem and
Hypothalamospinal_tract
Sensory nuclei in medulla oblongata
in the medulla oblongata. Their axons form an enclosed nerve tract called the solitary tract. Neurons of the SN are notably functionally arranged roughly
Solitary_nucleus
Spinal cord tract
posterior nerve roots. It is present throughout the spinal cord, and is most developed in the upper cervical regions. The posterolateral tract contains
Posterolateral_tract
Axons that connect cortical areas within the same cerebral hemisphere
Bundles of fibers are known as nerve tracts, and consist of association tracts, commissural tracts, and projection tracts. The association fibers unite
Association_fiber
Cranial nerve IX, for the tongue and pharynx
glossopharyngeal nerve (/ˌɡlɒsoʊfəˈrɪn(d)ʒiəl, -ˌfærənˈdʒiːəl/), also known as the ninth cranial nerve, cranial nerve IX, or simply CN IX, is a cranial nerve that
Glossopharyngeal_nerve
Part of the brainstem in humans and other bipeds
Costanzo Varolio (1543–1575). The pons contains neural pathways and nerve tracts that conduct signals from the brain down to the cerebellum and medulla
Pons
Consist of efferent and afferent fibers uniting the cortex
of axons (nerve fibers) called nerve tracts, within the brain, can be categorized by their function into association tracts, projection tracts, and commissural
Projection_fiber
Cranial nerve I, for smelling
information is transmitted into the brain via the olfactory tract. The fascicles of the olfactory nerve are not visible on a cadaver brain because they are severed
Olfactory_nerve
Central organ of the human nervous system
visual-spatial ability in the right. The hemispheres are connected by commissural nerve tracts, the largest being the corpus callosum. The cerebrum is connected by
Human_brain
Nerve tract
communicans (communicating) is the preganglionic sympathetic outflow nerve tract from the spinal cord. Each of the thoracic, and the first and second
White_ramus_communicans
In neuroanatomy, corticomesencephalic tract is a descending nerve tract that originates in the frontal eye field (Brodmann area 8) and terminates in the
Corticomesencephalic_tract
Nerve tract in the midbrain and pons
tegmental tract is a tract that carries ascending and descending fibers, situated in the midbrain tegmentum, and the pontine tegmentum. The tract is situated
Central_tegmental_tract
Part of the nervous system
is a part of the lateral indirect extrapyramidal tract. The rubrospinal tract fibers are efferent nerve fibers from the magnocellular part of the red nucleus
Rubrospinal_tract
State of unconsciousness
reticular formation (RF). The RAS has two tracts, the ascending and descending tract. The ascending tract, or ascending reticular activating system (ARAS)
Coma
Connection between brain and spinal cord
corticobulbar tracts) may directly innervate motor neurons of the spinal cord or brainstem (anterior (ventral) horn cells or certain cranial nerve nuclei),
Extrapyramidal_system
Nerve tract of the midbrain
The dorsal longitudinal fasciculus (DLF) is a distinctive nerve tract in the midbrain. It extends from the hypothalamus rostrally to the spinal cord caudally
Dorsal longitudinal fasciculus
Dorsal_longitudinal_fasciculus
Neuron cluster in the brainstem
pathology Vagovagal reflex, gastrointestinal tract reflex circuits where afferent and efferent fibers of the vagus nerve. Nucleus ambiguus Dorland's Illustrated
Dorsal_nucleus_of_vagus_nerve
Nerve tract of the spinal cord
The medial vestibulospinal tract is one of the descending spinal tracts of the ventromedial funiculus of the spinal cord. It is found only in the cervical
Medial_vestibulospinal_tract
Posterior part of the brain, adjoining and structurally continuous
transmission. Oculomotor nerve nucleus: This is the third cranial nerve nucleus. Trochlear nerve nucleus: This is the fourth cranial nerve. Red nucleus: This
Brainstem
Two-neuron white matter motor pathway
decussate, in contrast to those of the corticospinal tract where most decussate: cranial nerve nuclei innervating skeletal muscle thereby generally receive
Corticobulbar_tract
Primary cell of the nervous system
a cable). In the central nervous system bundles of axons are called nerve tracts. Neurons are highly specialized for the processing and transmission of
Neuron
Cranial nerve III, for eye movements
The oculomotor nerve, also known as the third cranial nerve, cranial nerve III, or simply CN III, is a cranial nerve that enters the orbit through the
Oculomotor_nerve
Structure of the invertebrate central nervous system
posterior, by fibrous nerve tracts called connectives. Pairs of hemisegments, corresponding to the left and right side of the ventral nerve cord, are connected
Ventral_nerve_cord
Pyramidal white matter motor pathway
anterior corticospinal tract neurons, the remaining 10%, stay ipsilateral in the spinal cord but decussate at the level of the spinal nerve in which they exit
Corticospinal_tract
Anatomy term
nasal cavity. Additionally, the corpus callosum of the human brain has a nerve tract known as the rostrum. The beak or snout of a vertebrate may also be referred
Rostrum_(anatomy)
The habenular commissure is a nerve tract of commissural fibers that connects the habenular nuclei on both sides of the habenular trigone in the epithalamus
Habenular_commissure
Nucleus in the basal ganglia of the brain
striatum consists of the caudate nucleus and the putamen. A white matter nerve tract (the internal capsule) in the dorsal striatum separates the caudate nucleus
Striatum
Nuclei in the dorsal column of the brainstem
brain via the thalamus. The dorsal column nuclei each have an associated nerve tract in the spinal cord, the gracile fasciculus and the cuneate fasciculus
Dorsal_column_nuclei
Nerve crossings outside the central nervous system
chiasm of the optic tract (type I or II) The chiasm of the Trochlear nerve (type I) The decussation of part of the Oculomotor nerve (type I) The optic
Chiasm_(anatomy)
Axons that connect the two hemispheres of the brain
posterior commissure (also known as the epithalamic commissure) is a rounded nerve tract crossing the middle line on the dorsal aspect of the upper end of the
Commissural_fiber
Bi-directional nerve tract
The subthalamic fasciculus is a bi-directional nerve tract that interconnects the lateral globus pallidus and subthalamic nucleus as part of the indirect
Subthalamic_fasciculus
Forward-most portion of the brainstem
fibres of the optic nerve (some fibres remain ipsilateral), and are involved with saccadic eye movements. The tectospinal tract connects the superior
Midbrain
Terminal branch of pudendal nerve
The dorsal nerve of the clitoris is a nerve in females that branches off the pudendal nerve to innervate the clitoris. The nerve is important for female
Dorsal_nerve_of_the_clitoris
The solitariospinal tract is a descending nerve tract that controls breathing by promoting the action of inspiratory muscles (note that exhalation is
Solitariospinal_tract
Anatomical area in the human groin
iliopubic tract superiorly and the peritoneal reflection below. Contents of this triangle include the femoral branch of the genitofemoral nerve, and the
Triangle_of_Doom
Network or circuit of neurons
oscillation Pulse-coupled networks Systems neuroscience Connectomics Nerve tract Neural pathway Nerve plexus Purves, Dale (2011). Neuroscience (5th ed.). Sunderland
Neural_circuit
Part of the nervous system excluding the brain and spinal cord
developmental origin. The second cranial nerve is not a true peripheral nerve but a tract of the diencephalon. Cranial nerve ganglia, as with all ganglia, are
Peripheral_nervous_system
Efferent motor root of a spinal nerve
to form a mixed spinal nerve. Cervical vertebra Medulla spinalis A spinal nerve with its anterior and posterior. The motor tract. Diagrammatic transverse
Ventral_root_of_spinal_nerve
Visual maladies
following way: Retina→Optic nerve→Optic chiasma (here the nasal visual field of both eyes cross over to the opposite side)→Optic tract→Lateral geniculate body→Optic
Visual_pathway_lesions
Nerve tracts in the brainstem
muscle tone. Ascending tracts arise from the vestibular nucleus and terminate in the oculomotor nucleus (of the oculomotor nerve, CN III), the trochlear
Medial longitudinal fasciculus
Medial_longitudinal_fasciculus
Nerve in the human body
The recurrent laryngeal nerve (RLN), also known as nervus recurrens, is a branch of the vagus nerve (cranial nerve X) that supplies all the intrinsic muscles
Recurrent_laryngeal_nerve
Extinct genus of comb jellies
nerves merged with a circumoral nerve ring, which may have controlled the oral skirt during feeding. The circumoral nerve ring has not been reported in
Ctenorhabdotus
Vital part of the nervous system controlling the gastrointestinal tract
the vagus nerve and prevertebral ganglia in healthy subjects. However, studies have shown that the system is operable with a severed vagus nerve. The neurons
Enteric_nervous_system
Part of the olfactory system
The olfactory tract (olfactory peduncle or olfactory stalk) is a bilateral bundle of afferent nerve fibers from the mitral and tufted cells of the olfactory
Olfactory_tract
Sensory nerve of the face
fissure: frontal nerve supraorbital nerve supratrochlear nerve lacrimal nerve nasociliary nerve posterior ethmoidal nerve anterior ethmoidal nerve external nasal
Ophthalmic_nerve
Pontine cranial nerve nuclei Chief or pontine nucleus of the trigeminal nerve sensory nucleus (V) Motor nucleus for the trigeminal nerve (V) Abducens nucleus
List of regions in the human brain
List_of_regions_in_the_human_brain
Neural pathway involved with circadian rhythms
to the retinohypothalamic tract project directly, monosynaptically, to the suprachiasmatic nuclei (SCN) via the optic nerve and the optic chiasm. The
Retinohypothalamic_tract
Parasympathetic nervous system inhibitors
system by selectively blocking the binding of ACh to its receptor in nerve cells. The nerve fibers of the parasympathetic system are responsible for the involuntary
Anticholinergic
Deep groove separating the two cerebral hemispheres of the vertebrate brain
also plays a role in the optic nerve tract. This is shown in (figure 4.) with the optic chiasm, which takes the nerve from the right eye to the left hemisphere
Longitudinal_fissure
Inability to recall words when speaking
left hemisphere. More specifically, the damage was in a part of the nerve tract called the arcuate fasciculus, for which the mechanism of action is unknown
Anomic_aphasia
White matter structure of the brain
The extreme capsule (Latin: capsula extrema) is a series of nerve tracts between the claustrum and the insular cortex. It is also described as a thin capsule
Extreme_capsule
External genitalia of the female mammal
that supply the vulva are the pudendal nerve, perineal nerve, ilioinguinal nerve and their branches. Blood and nerve supply to the vulva contribute to the
Vulva
Nerve tract of the brain
Nerve tract of the brain
Occipitofrontal_fasciculus
Inability to completely empty the bladder
long-term urinary retention are at risk of urinary tract infections. Causes include blockage of the urethra, nerve problems, certain medications, and weak bladder
Urinary_retention
Sensory spinal pathway
from the same source, viz., the posterior nerve roots. Some ascend for only a short distance in the tract, and, entering the gray matter, come into close
Dorsal column–medial lemniscus pathway
Dorsal_column–medial_lemniscus_pathway
Muscle of the thigh
the superior gluteal nerve, L5 and S1. At its origins of the anterior rami of L4, L5, and S1 nerves, the superior gluteal nerve exits the pelvis via greater
Tensor_fasciae_latae_muscle
Division of the nervous system supplying internal organs, smooth muscle and glands
cranial nerves (specifically the oculomotor nerve, facial nerve, glossopharyngeal nerve and vagus nerve) and sacral (S2-S4) spinal cord. These divisions
Autonomic_nervous_system
Medical treatment that involves delivering electrical impulses to the vagus nerve
Vagus nerve stimulation (VNS) is a medical treatment that involves delivering electrical impulses to the vagus nerve. Initially developed by James Leonard
Vagus_nerve_stimulation
Small bilateral neuronal structure in the brain of vertebrates
the habenula and the interpeduncular nucleus is one of the first major nerve tracts to form in the developing brain. The habenula is a central structure
Habenula
The dorsal trigeminal tract (also dorsal trigeminothalamic tract, or posterior trigeminothalamic tract) are uncrossed second-order sensory fibers conveying
Dorsal_trigeminal_tract
Part of the spinal cord
The dorsal root of spinal nerve (or posterior root of spinal nerve or sensory root)[citation needed] is one of two "roots" which emerge from the spinal
Dorsal_root_of_spinal_nerve
Uncomfortable skin sensation
centrally in two distinct systems that both use the same nerve bundle and spinothalamic tract. Most commonly, an itch is felt in one place. If it is felt
Itch
Speed at which an electrochemical impulse propagates down a neural pathway
In neuroscience, nerve conduction velocity (CV) is the speed at which an electrochemical impulse propagates down a neural pathway. Conduction velocities
Nerve_conduction_velocity
Muscle in the quad
corticospinal tract decussates and becomes the lateral corticospinal tract. The nerve signal will continue down the lateral corticospinal tract until it reaches
Rectus_femoris_muscle
External opening of the rectum
nerves, which branch from the pudendal nerve. The pseudostratified columnar epithelium of the gastrointestinal tract transitions to stratified squamous epithelium
Human_anus
Main component of the nervous system
of nerve body cells bundled or connected together in the PNS) Enteric glia: Found in the enteric nervous system, within the gastrointestinal tract. In
Nervous_tissue
Pair of structures in the brains of some arthropods and annelids
a protuberance that is joined to the rest of the brain by a central nerve tract or peduncle. Most of our current knowledge of mushroom bodies comes from
Mushroom_bodies
Organ central to the nervous system
no counterpart in other vertebrates. In placentals, there is a wide nerve tract connecting the cerebral hemispheres called the corpus callosum. The brains
Brain
Large, air-filled space above and behind the nose in the middle of the face
nerve fibers originating from the facial nerve. The two nasal cavities condition the air to be received by the other areas of the respiratory tract.
Nasal_cavity
Reflex where rotation of the head causes eye movement to stabilize vision
directly to the lateral rectus muscle of the eye via the abducens nerve. Another nerve tract projects from the abducens nucleus by the medial longitudinal
Vestibulo-ocular_reflex
Neuron cluster in the brainstem
collection of neurons in the brainstem that belong to the facial nerve (cranial nerve VII). These lower motor neurons innervate the muscles of facial expression
Facial_motor_nucleus
Cluster of neurons in the brainstem
The principal sensory nucleus of trigeminal nerve (or chief sensory nucleus of V, main trigeminal sensory nucleus) is a group of second-order neurons
Principal sensory nucleus of trigeminal nerve
Principal_sensory_nucleus_of_trigeminal_nerve
V of spinal cord → spinomesencephalic tract → mesencephalon raphe nuclei → Nociceptive group C first-order nerve fiber → interneurons of lamina II (substantia
Raphespinal_tract
Reflex circuits in the gastrointestinal tract
Vagovagal reflex refers to gastrointestinal tract reflex circuits where afferent and efferent fibers of the vagus nerve coordinate responses to gut stimuli via
Vagovagal_reflex
Branch of the vagus nerve
joins the vagus nerve. This allows for impulses to reach the solitary tract of the brainstem. The aortic nerve is part of the nerve pathway that allows
Aortic_nerve
Neural circuit
mammillary bodies from the Papez circuit. The fornix is a bundle of nerve tracts made of white matter. It is crucial in normal cognitive functions. Harm
Papez_circuit
Division of the autonomic nervous system
cranial nerves, specifically the oculomotor nerve, facial nerve, glossopharyngeal nerve, and vagus nerve. Three spinal nerves in the sacrum (S2–4), commonly
Parasympathetic nervous system
Parasympathetic_nervous_system
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