Abducens Nerve
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  Abducens Nerve



Abducens Nerve

   The 6th cranial nerve. The abducens nerve originates in the abducens nucleus of the pons and sends motor fibers to the lateral rectus muscles of the eye. Damage to the nerve or its nucleus disrupts horizontal eye movement control.

RELATED TERMS
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Cranial
The anatomical term for towards the head; also the general term for of the head. i.e. the lungs are cranial to the pelvis. See Caudal/Inferior/Superior

Nerve
Tissue that conveys sensation, temperature, position information to the brain.

Nucleus
Plural: nuclei. The compartment of a cell that contains the chromosomes.

Pons
A piece of connecting tissue, specifically the bridge of white matter at the base of the brain.

Lateral
Toward the side, sideways.

Eye
The organ of sight. The eye has a number of components. These components include but are not limited to the cornea, iris, pupil, lens, retina, macula, optic nerve, choroid and vitreous.



SIMILAR TERMS
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Abducens Nerve Palsy
Diseases of the sixth cranial (abducens) nerve or its nucleus in the pons. The nerve may be injured along its course in the pons, intracranially as it travels along the base of the brain, in the cavernous sinus, or at the level of superior orbital fissure or orbit. Dysfunction of the nerve causes lateral rectus muscle weakness, resulting in horizontal diplopia that is maximal when the affected eye is abducted and ESOTROPIA. Common conditions associated with nerve injury include INTRACRANIAL HYPERTENSION; CRANIOCEREBRAL TRAUMA; ISCHEMIA; and INFRATENTORIAL NEOPLASMS.

Abducens Nerve Traumas
Traumatic injury to the abducens, or sixth, cranial nerve. Injury to this nerve results in lateral rectus muscle weakness or paralysis. The nerve may be damaged by closed or penetrating CRANIOCEREBRAL TRAUMA or by facial trauma involving the orbit.

Abducent nerve
A small motor nerve that has one task: to supply a muscle called the lateral rectus muscle that moves the eye outward. Paralysis of the abducent nerve causes inward turning of the eye (internal strabismus) leading to double vision. The abducent nerve is the sixth cranial nerve. All 12 cranial nerves, the abducent nerve included, emerge from or enter the skull (the cranium), as opposed to the spinal nerves which emerge from the vertebral column.

Abduction
In medicine, the movement of a limb away from the midline of the body. Abduction of both legs spreads the legs. The opposite of abduction is adduction. Adduction of the legs brings them together.

Abductor muscle
Any muscle used to pull a body part away from the midline of the body. For example, the abductor muscles of the legs spread the legs away from the midline and away from one another.

Abductor spasmodic dysphonia
A disorder in which sudden muscle spasms cause the vocal folds (or vocal cords) to stay open. See spasmodic dysphonia.



PREVIOUS AND NEXT TERMS
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Extraction of the fetus by means of abdominal hysterotomy.

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External decompression applied to the lower body. It is used to study orthostatic intolerance and the effects of gravitation and acceleration, to produce simulated hemorrhage in physiologic research, to assess cardiovascular function, and to reduce abdominal stress during childbirth.

Abdominal Cramps
Paroxysms of pain. This condition usually occurs in the abdominal region but may occur in other body regions as well.

Abducens Nerve Traumas
Traumatic injury to the abducens, or sixth, cranial nerve. Injury to this nerve results in lateral rectus muscle weakness or paralysis. The nerve may be damaged by closed or penetrating CRANIOCEREBRAL TRAUMA or by facial trauma involving the orbit.

Abducens Nerve Palsy
Diseases of the sixth cranial (abducens) nerve or its nucleus in the pons. The nerve may be injured along its course in the pons, intracranially as it travels along the base of the brain, in the cavernous sinus, or at the level of superior orbital fissure or orbit. Dysfunction of the nerve causes lateral rectus muscle weakness, resulting in horizontal diplopia that is maximal when the affected eye is abducted and ESOTROPIA. Common conditions associated with nerve injury include INTRACRANIAL HYPERTENSION; CRANIOCEREBRAL TRAUMA; ISCHEMIA; and INFRATENTORIAL NEOPLASMS.

Abducens Nerve

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Radiographic visualization of the body between the thorax and the pelvis, i.e., within the peritoneal cavity.

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Ectopic pregnancy with development of the fetus in the abdominal cavity. (Dorland, 27th ed)

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A mass of histologically normal tissue present in an abnormal location.

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