What are the six extrinsic muscles that move the human eye?

What are the six extrinsic muscles that move the human eye?

Description: The extraocular muscles are the six muscles that control movement of the eye (Superior rectus, Inferior rectus, Lateral rectus, Medial rectus, Superior oblique and Inferior oblique) and one muscle that controls eyelid elevation (levator palpebrae).

What nerves control the extrinsic eye muscles?

The extraocular muscles are innervated by lower motor neurons that form three cranial nerves: the abducens, the trochlear, and the oculomotor (Figure 20.3). The abducens nerve (cranial nerve VI) exits the brainstem from the pons-medullary junction and innervates the lateral rectus muscle.

What nerve controls muscles that move the eye?

The autonomic nervous system supplies (innervates) organs, like your eyes. The oculomotor nerve is the third cranial nerve (CN III). It allows movement of the eye muscles, constriction of the pupil, focusing the eyes and the position of the upper eyelid.

Which cranial nerves innervate the extrinsic muscles of the eye to stimulate eyeball movement?

The oculomotor nerve is the third cranial nerve (CN III). It enters the orbit through the superior orbital fissure and innervates extrinsic eye muscles that enable most movements of the eye and that raise the eyelid.

What are the muscles that move the eye called quizlet?

often called extraocular muscles, move the eyes.

Which cranial nerve Innervates extrinsic eye muscles quizlet?

It helps move the eye up and down and from side to side. It is one of the extraocular muscles. It is innervated by the superior division of the oculomotor nerve (Cranial Nerve III).

What is the extrinsic eye muscles?

Extrinsic eye muscles (also called extraocular muscles) are attached to the outside of the eyeball and enable the eyes to move in all directions of sight. There are six extraocular eye muscles and one muscle that controls movement in the upper eyelid.

What muscle does cranial nerve 6?

lateral rectus muscle
Cranial nerve 6, also called the abducens nerve, controls the movement of the lateral rectus muscle. This muscle moves the eye outward, away from the nose. When this nerve is damaged, it may not be able to do its job.

What is sixth nerve palsy of the eye?

Sixth nerve palsy occurs when the sixth cranial nerve is damaged or doesn’t work right. It’s also known as the abducens nerve. This condition causes problems with eye movement. The sixth cranial nerve sends signals to your lateral rectus muscle.

Which cranial nerve moves the eye quizlet?

The sixth cranial nerve, the abducens, is so named because it controls the lateral rectus, which abducts the eye (rotates it laterally) upon contraction.

What are the muscles that move the eye called also known locations?

EXTRAOCULAR MUSCLES: The superior rectus is an extraocular muscle that attaches to the top of the eye. It moves the eye upward. The inferior rectus is an extraocular muscle that attaches to the bottom of the eye. It moves the eye downward.

Which of the following are the extrinsic muscles that move the eye quizlet?

Terms in this set (8)

• superior rectus. Origin: common tendinous ring.
• Inferior rectus. Origin: sonnon tendinous ring.
• Medial Rectus. Origin: common tendinous ring.
• Lateral Rectus. Origin: common tendinous ring.
• Superior Oblique. Origin: body of sphenoid.
• trochlea.
• inferior oblique.
• levator palpebrae superioris.