Scheme showing structure of a typical spinal nerve. 1. Somatic efferent. 2. Somatic afferent. 3,4,5. Sympathetic efferent. 6,7. Sympathetic afferent.
Anatomical terminology
[edit on Wikidata]
The general (spinal) somatic efferent neurons (GSE, somatomotor, or somatic motor fibers) arise from motor neuron cell bodies in the ventral horns of the gray matter within the spinal cord. They exit the spinal cord through the ventral roots, carrying motor impulses to skeletal muscle through a neuromuscular junction.[1]
Of the somatic efferent neurons, there exist subtypes.
Alpha motor neurons (α) target extrafusal muscle fibers.
Gamma motor neurons (γ) target intrafusal muscle fibres
Cranial nerves also supply their own somatic efferent neurons to the extraocular muscles and some of the muscles of the tongue.
^Ross, Muriel D. (April 1969). "The general visceral efferent component of the eighth cranial nerve" (PDF). Journal of Comparative Neurology. 135 (4): 453–477. doi:10.1002/cne.901350405. hdl:2027.42/49992. PMID 5768884. S2CID 17079650.
and 30 Related for: General somatic efferent fiber information
The general (spinal) somaticefferent neurons (GSE, somatomotor, or somatic motor fibers) arise from motor neuron cell bodies in the ventral horns of the...
types of efferentfibers: generalsomaticefferentfibers (GSE), general visceral efferentfibers (GVE) and special visceral efferentfibers (SVE). Subtypes...
these fibres. General visceral efferentfiber (GVE) Referred pain Generalsomatic afferent fiber (GSA) Special somatic afferent fiber (SSA) Special visceral...
Types of afferent fibers include the generalsomatic, the general visceral, the special somatic and the special visceral afferent fibers. Alternatively,...
which forms the generalsomaticefferentfibers (GSE); the facial and motor trigeminal nuclei, which form the special visceral efferent (SVE) column, and...
motoneuron or efferent neuron) is a neuron whose cell body is located in the motor cortex, brainstem or the spinal cord, and whose axon (fiber) projects to...
hypoglossal nucleus, which contains generalsomaticefferentfibers. The nucleus ambiguus, which form the special visceral efferent. The dorsal nucleus of vagus...
signal from the afferent fiber does not reach the brain, but produces the reflexive movement by direct connections with the efferent nerves in the spine....
The generalsomatic afferent fibers (GSA or somatic sensory fibers) afferent fibers arise from neurons in sensory ganglia and are found in all the spinal...
(afferents) and the motor fibers (efferents). The first group A, was subdivided into alpha, beta, gamma, and delta fibers – Aα, Aβ, Aγ, and Aδ. The motor...
neuromuscular junction, each muscle fiber receives input from just one somaticefferent neuron. Action potential in a somaticefferent neuron causes the release...
interneurons. The primary output of α-MNs is to extrafusal muscle fibers. This afferent and efferent connectivity is required to achieve coordinated muscle activity...
integrated development environment Gaussian Symplectic ensemble Generalsomaticefferentfibers Georgian Soviet Encyclopedia Georgian State Electrosystem Ghanaian...
type GSA, generalsomatic afferent, to skin of the posterior ear. The facial nerve also carries axons of type GVE, general visceral efferent, which innervate...
the otic ganglion and then to the parotid gland It receives generalsomatic sensory fibers (ventral trigeminothalamic tract) from the tonsils, the pharynx...
sympathetic fibers as the efferentfibers are.: 34–35 Instead, autonomic sensory information is conducted by general visceral afferent fibers. General visceral...
extrafusal muscle fibers, the myofibril contractile apparatus of spindle fibers are located only at both ends of spindle. Efferent stimulation of the...
sympathetic fibers as the efferentfibers are. Instead, autonomic sensory information is conducted by general visceral afferent fibers. General visceral...
anterior belly of the digastric. The trigeminal nerve carries generalsomatic afferent fibers (GSA), which innervate the skin of the face via ophthalmic...
(Mueller's) muscle. The oculomotor nerve includes axons of type GSE, generalsomaticefferent, which innervate skeletal muscle of the levator palpebrae superioris...
nerves, unlike somatic nerves, contain only efferentfibers. Sensory signals coming from the viscera course into the CNS through the somatic sensory nerves...
known as the visceral nervous system and although most of its fibers carry non-somatic information to the CNS, many authors still consider it only connected...
studies of sympathetic efferent activity. An individual nerve consists of a number of fascicles, i.e. bundles of nerve fibers enclosed within a connective...
brain and spinal cord. The PNS consists mainly of nerves, which are long fibers that connect the CNS to every other part of the body. The PNS includes motor...