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Encyclopedia > Abducens nerve
Nerve: Abducens nerve
Oblique section through the cavernous sinus.
Nerves of the orbit, and the ciliary ganglion. Side view. (Abducens visible center bottom)
Latin N. Abducens
Gray's subject #201 899
Innervates lateral rectus muscle
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MeSH {{{MeshNumber}}}
Dorlands/Elsevier {{{DorlandsPre}}}/{{{DorlandsSuf}}}

The sixth of twelve cranial nerves, the abducens nerve is a motor nerve that innervates the lateral rectus muscle and therefore controls each eye's ability to abduct (move away from the midline). The abducens nerve emerges from the ipsilateral abducens nucleus between the caudal pons beneath the floor of the fourth ventricle and the medulla (the pontomedullary junction). The abducens nerve exits the skull through the superior orbital fissure, one of the holes in the skull behind the eye. Image File history File links Gray571. ... Image File history File links Gray777. ... In anatomy, the orbit is the cavity or socket of the skull in which the eye and its appendages are situated. ... The ciliary ganglion is small parasympathetic ganglion lying in the orbit between the optic nerve and the lateral rectus muscle that is associated with the nasociliary nerve (a branch of the ophthalmic division of the trigeminal nerve). ... Latin is an ancient Indo-European language originally spoken in the region around Rome called Latium. ... The lateral rectus muscle is a muscle in the orbit that abducts the eyeball (makes it move outwards). ... Medical Subject Headings (MeSH) is a huge controlled vocabulary (or metadata system) for the purpose of indexing journal articles and books in the life sciences. ... Elseviers logo Elsevier, the worlds largest publisher of medical and scientific literature, forms part of the Reed Elsevier group. ... Grays Fig. ... Motor nerves enable the brain to stimulate muscle contraction. ... The lateral rectus muscle is a muscle in the orbit that abducts the eyeball (makes it move outwards). ... Closeup of a blue-green human eye. ... The movement of body structures is accomplished by the contraction of muscles. ... The abducens nucleus is the originating nucleus from which the abducens nerve emerges - a cranial nerve nucleus. ... Position of the pons in the human brain The pons (sometimes pons Varolii after Costanzo Varolio) is a knob on the brain stem. ... The fourth ventricle is one of the four connected fluid-filled cavities within the human brain. ... The medulla oblongata is the lower portion of the brainstem. ... The superior orbital fissure is a foramen in the skull, although strictly it is more of a cleft, lying between the lesser and greater wings of the sphenoid bone. ...


See also

Sixth (abducent) nerve palsy is a disorder associated with dysfunction of cranial nerve VI (the abducens nerve), which is responsible for moving the eye to the side. ...

External links

Major nerves (also see Peripheral nervous system)

Cranial nerves: I olfactory | II optic | III oculomotor | IV trochlear | V trigeminal | V1 ophthalmic (lacrimal, frontal, supratrochlear, supraorbital, nasociliary, ciliary ganglion) | V2 maxillary (sphenopalatine ganglion) | V3 mandibular (buccal - auriculotemporal - lingual - inferior alveolar - otic ganglion) | VI abducens | VII facial (chorda tympani, nervus intermedius) | VIII vestibulocochlear (cochlear, vestibular) | IX glossopharyngeal | X vagus (recurrent laryngeal, Alderman's nerve) | XI accessory | XII hypoglossal NeuroNames is a system of nomenclature for the brain and related structures. ... Nerves (yellow) Nerves redirects here. ... The peripheral nervous system or PNS, is part of the nervous system, and consists of the nerves and neurons that reside or extend outside the central nervous system--to serve the limbs and organs, for example. ... Grays Fig. ... The olfactory nerve is the first of twelve cranial nerves. ... The optic nerve is the nerve that transmits visual information from the retina to the brain. ... The oculomotor nerve () is the third of twelve paired cranial nerves. ... The fourth of twelve cranial nerves, the trochlear nerve controls the function of the superior oblique muscle, which rotates the eye away from the nose and also moves the eye downward. ... The trigeminal nerve is the fifth (V) cranial nerve, and carries sensory information from most of the face, as well as motor supply to the muscles of mastication (the muscles enabling chewing), tensor tympani (in the middle ear), and other muscles in the floor of the mouth, such as the... The Ophthalmic nerve is one of the three branches of the trigeminal nerve, one of the cranial nerves. ... The Lacrimal Nerve is the smallest of the three branches of the ophthalmic. ... The Frontal Nerve is the largest branch of the ophthalmic, and may be regarded, both from its size and direction, as the continuation of the nerve. ... The supratrochlear nerve, smaller than the Supraorbital nerve, passes above the pulley of the Obliquus superior, and gives off a descending filament, to join the infratrochlear branch of the nasociliary nerve. ... The supraorbital nerve arises from the orbit by the supraorbital foramen and supplies the upper eyelid and forehead integuments. ... The Ophthalmic nerve is one of the three branches of the trigeminal nerve, one of the cranial nerves. ... The ciliary ganglion is small parasympathetic ganglion lying in the orbit between the optic nerve and the lateral rectus muscle that is associated with the nasociliary nerve (a branch of the ophthalmic division of the trigeminal nerve). ... The Maxillary nerve is one of the three branches of the trigeminal nerve, one of the cranial nerves. ... The sphenopalatine ganglion is a parasympathetic ganglion found in the spheno-maxillary fossa. ... The mandibular nerve is the third branch (V3) of the trigeminal nerve. ... A branch of the mandibular nerve (which is itself a branch of the trigeminal nerve), the buccal nerve transmits sensory information from skin over the buccal membrane (in general, the cheek) and from the second and third molar teeth. ... The auriculotemporal nerve is a branch of the mandibular nerve (Viii) and supplies motor fibres to the temporomandibular joint and parasympathetic fibres to the parotid glands. ... The Lingual Nerve supplies the mucous membrane of the anterior two-thirds of the tongue. ... The inferior alveolar nerve is a branch of the mandibular nerve, which is itself the third branch (V3) of the fifth cranial nerve, the trigeminal nerve (cranial nerve V). ... The Otic Ganglion is a parasympathetic ganglion located immediately below the foramen ovale. ... The facial nerve is seventh of twelve paired cranial nerves. ... The chorda tympani are nerves of special sensation given off the facial nerve (VII) inside the skull. ... The nervus intermedius, or intermediate nerve, is the part of the facial nerve (cranial nerve VII) located between the motor component of the facial nerve and the vestibulocochlear nerve (cranial nerve VIII). ... The vestibulocochlear nerve is the eighth of twelve cranial nerves and also known as the auditory nerve. ... The Cochlear nerve (n. ... The Vestibular nerve is one of the two branches of the Vestibulocochlear nerve (the cochlear nerve is the other. ... The glossopharyngeal nerve is the ninth of twelve cranial nerves. ... The vagus nerve (or pneumogastric nerve) is the tenth of twelve paired cranial nerves, and is the only nerve that starts in the brainstem (within the medulla oblongata) and extends, through the jugular foramen, down below the head, to the abdomen. ... The recurrent laryngeal nerve is a branch of the vagus nerve (the tenth cranial nerve) which supplies motor function and sensation to the larynx (voice box). ... The Auricular branch of the tenth cranial or vagus nerve is often termed the Aldermans nerve. ... The accessory nerve is the eleventh of twelve cranial nerves. ... The hypoglossal nerve is the twelfth cranial nerve. ...


Posterior spinal nerves: greater occipital The term spinal nerve generally refers to the mixed spinal nerve, which is formed from the dorsal and ventral roots that come out of the spinal cord. ... The greater occipital nerve is a spinal nerve arising between the first and second cervical vertebrae, along with the lesser occipital nerve. ...


C1-C4 - Cervical plexus: lesser occipital | greater auricular | lesser auricular | phrenic | ansa cervicalis The cervical plexus is a plexus of the ventral roots of the first four cervical spinal nerves which are located from C1 to C4 cervical segment near the neck. ... The lesser occipital nerve is a spinal nerve arising between the first and second cervical vertebrae, along with the greater occipital nerve. ... The greater auricular nerve originates from the cervical plexus, composed of branches of spinal nerves C2 and C3. ... The lesser auricular nerve originates from the cervical plexus, composed of branches of spinal nerves C2 and C3. ... The phrenic nerve arises from the third, fourth, and fifth cervical spinal nerves (C3-C5). ... The ansa cervicalis (or ansa hypoglossi in older literature) is a loop of nerves that are part of the cervical plexus. ...


C5-C8, T1 - Brachial plexus: supraclavicular branches (dorsal scapular, suprascapular, long thoracic) | lateral cord (musculocutaneous, lateral antibrachial cutaneous, lateral head of median nerve) | medial cord (ulnar, medial head of median nerve, medial antibrachial cutaneous, medial brachial cutaneous) | posterior cord (axillary, radial) The brachial plexus is an arrangement of nerve fibres (a plexus) running from the spine (vertebrae C5-T1), through the neck, the axilla (armpit region), and into the arm. ... The dorsal scapular nerve arises from the brachial plexus, specifically from spinal nerves C4 and C5. ... The Nervus suprascapularis (Suprascapular nerve) is a nerve of the plexus brachialis. ... Grays Fig. ... The Lateral cord is a division of the brachial plexus. ... The major end branch of the lateral cord, courses inferiorly within the anterior arm, supplying motor fibers to the arm muscles that flex the forearm (the biceps brachii and brachialis). ... The lateral antibrachial cutaneous nerve (branch of musculocutaneous nerve, also sometimes spelled antebrachial) passes behind the cephalic vein, and divides, opposite the elbow-joint, into a volar and a dorsal branch. ... Diagram from Grays anatomy, depicting the peripheral nerves of the upper extremity, amongst others the median nerve The median nerve is a nerve that runs down the arm and forearm. ... The Medial cord is a division of the brachial plexus. ... Grays Fig. ... Diagram from Grays anatomy, depicting the peripheral nerves of the upper extremity, amongst others the median nerve The median nerve is a nerve that runs down the arm and forearm. ... The Medial Antibrachial Cutaneous Nerve (internal cutaneous nerve, also sometimes spelled antebrachial) arises from the medial cord of the brachial plexus. ... The Medial Brachial Cutaneous Nerve (lesser internal cutaneous nerve; nerve of Wrisberg) is distributed to the skin on the ulnar side of the arm. ... The Posterior cord is a division of the brachial plexus. ... The axillary nerve is a nerve of the human body, that comes off the posterior cord of the brachial plexus at the level of the axilla (armpit) and carriers nerve fibers from C5 and C6. ... The radial nerve is a nerve in the human body, that supplies the arm, the forearm and the hand. ...


T2-T11: intercostal The thoracic spinal nerves T3 through T12. ...


T12, L1-L5 - Lumbar plexus: iliohypogastric | ilioinguinal | genitofemoral | lateral femoral cutaneous | femoral | obturator Grays Fig. ... The Iliohypogastric Nerve arises from the first lumbar nerve. ... The Ilioinguinal Nerve, smaller than the Iliohypogastric nerve, arises with it from the first lumbar nerve. ... In human anatomy, the genitofemoral nerve originates from the upper part of the lumbar plexus of spinal nerves. ... The Lateral Femoral Cutaneous Nerve (external cutaneous nerve) arises from the dorsal divisions of the second and third lumbar nerves. ... The Femoral Nerve supplies innervation the anterior portion of the leg. ... The Obturator Nerve arises from the ventral divisions of the second, third, and fourth lumbar nerves; the branch from the third is the largest, while that from the second is often very small. ...


S1-S4 - Sacral plexus: gluteal | posterior femoral cutaneous | tibial | sciatic | sural | common peroneal In human anatomy, the Sacral plexus refers to the nerve plexus emerging from the sacral vertebrae (S1-S4), and which provides nerves for the pelvis and lower limbs. ... The Superior Gluteal Nerve () arises from the dorsal divisions of the fourth and fifth lumbar and first sacral nerves: it leaves the pelvis through the greater sciatic foramen above the Piriformis, accompanied by the superior gluteal vessels, and divides into a superior and an inferior branch. ... The Posterior Femoral Cutaneous Nerve (small sciatic nerve) is distributed to the skin of the perineum and posterior surface of the thigh and leg. ... The Tibial Nerve The tibial nerve passes through the popliteal fossa to pass below the arch of soleus. ... This article or section may be confusing or unclear for some readers, and should be edited to rectify this. ... The sural nerve (short saphenous nerve), formed by the junction of the medial sural cutaneous with the peroneal anastomotic branch, passes downward near the lateral margin of the tendo calcaneus, lying close to the small saphenous vein, to the interval between the lateral malleolus and the calcaneus. ... The Common peroneal nerve is a branch of the Sciatic nerve. ...


S2-S5 - Pudendal plexus: perforating cutaneous | pudendal | visceral | muscular | anococcygeal The pudendal plexus is not sharply marked off from the sacral plexus, and as a consequence some of the branches which spring from it may arise in conjunction with those of the sacral plexus. ... The Perforating Cutaneous Nerve usually arises from the posterior surface of the second and third sacral nerves. ... The pudendal nerve is responsible for orgasm, urination, and defecation in both sexes. ... The Visceral Branches arise from the third and fourth, and sometimes from the second, sacral nerves, and are distributed to the bladder and rectum and, in the female, to the vagina; they communicate with the pelvic plexuses of the sympathetic. ... The Muscular Branches are derived from the fourth sacral, and supply the Levator ani, Coccygeus, and Sphincter ani externus. ... Anococcygeal Nerves: The fifth sacral nerve receives a communicating filament from the fourth, and unites with the coccygeal nerve to form the coccygeal plexus. ...


 
 

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