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external eye muscles 6 extrinsic eye muscles
4-rectus (straight) muscles originate from the anualar ring
superior (3), inferrrior (3) , medial(3) lateral (6)- move eye up and down medially and laterally
2-oblique muscles
superior (4) and inferrior oblique (3)look side>side: one eye is elevated/the others depressed
What else can I help you with?
Which extrinsic eye muscle originates from the sphenoid bone?
The extrinsic eye muscle that originates from the sphenoid bone is the superior rectus muscle. This muscle is responsible for elevating the eye and helps in adduction and intorsion. It is one of the six extraocular muscles that control eye movements.
What extrinsic eye muscle turns the eye medially?
The Medial Rectus.
What extrinsic eye muscle would cause lateral strabismus of the right eye?
lateral rectus
What is the condition caused by unequal tension exerted by the extrinsic eye muscle?
strabismus
Why is it more of a strain on the intrinsic and extrinsic eye muscle to look at the close objects than at far objects?
extrinsic muscles are strained
What extrinsic muscle Turns eye up and laterally is called what extrinsic muscle?
Inferior Oblique Human & Physiology Lab Manual, Cat Edition 10th Edition p365
What is the extrinsic eye muscle that circles the bottom part of the eyeball?
The muscle that circles underneath the eyeball is the inferior oblique. The purpose of the inferior oblique is to move the eye upward.
Is the eye an involuntary muscle?
The intrinsic muscle are involunary and respond to light intensity and required focal langth without conscious intervention. The extrinsic muscle of the eye are volunary and move the eye to look around under conscious control. The eye itself is ofcourse not a muscle at all.
What nerve governs most of the extrinsic eye muscle?
Trochlear Nerve innervates Superior Oblique(extrinsic eye muscle)Oculomotor Nerve innervates Inferior Oblique, Superior Rectus, Inferior Rectus, and Medial Rectus (which are all extrinsic eye muscles) along with Ciliary Body, and the Iris (which are both intrinsic eye muscles)Abducens Nerve innervates Lateral Rectus(extrinsic eye muscle)
What extrinsic eye muscle turns the eye up and laterally?
Superior Rectus allows you to look Up & In, whiel the Superior Oblique allows you to look Up & Out.
Is it true that the extrinsic eye muscle motor units contain only 8 to 12 muscle cells and in some cases as few as 2 or 3 muscle cells?
yes true
The extrinsic muscle of the hand originate on the what?
Extrinsic muscles of the hand originate in the antebrachium (forearm).
