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What is the psoas nerve?
The psoas nerve is the nerve that innervates the psoas major muscle. It is formed by fibers of spinal nerves L2-L4.
What major nerve innervates the extensors of the leg?
The sciatic nerve is the major nerve that innervates the extensor muscles of the leg, particularly the tibialis anterior muscle. It is a large nerve that branches into the common fibular nerve and the tibial nerve, both of which supply various muscles in the leg.
Which adductor muscle is innervated by two nerves?
The adductor magnus muscle is innervated by two nerves: the obturator nerve, which innervates the adductor part, and the tibial part of the sciatic nerve, which innervates the hamstring part. This dual innervation reflects the muscle's complex structure and varied functions in hip adduction and extension.
What nerve controls gastrocnemius?
The tibial nerve controls the gastrocnemius muscle. It is a branch of the sciatic nerve and innervates the muscles of the posterior compartment of the leg, including the gastrocnemius.
What does Facial nerve VII do to the eye?
The facial nerve (cranial nerve VII) plays a crucial role in controlling the muscles of facial expression, including those around the eye. It innervates the orbicularis oculi muscle, which is responsible for closing the eyelids, facilitating blinking and protecting the eye. Additionally, the facial nerve contributes to tear production by stimulating the lacrimal glands through its parasympathetic fibers. Dysfunction of the facial nerve can lead to problems such as dry eyes or inability to close the eyelids properly.
What muscle and nerve will you need to isolate to study the physiology of nerve fibers?
To study the physiology of nerve fibers, you would need to isolate a specific muscle and the nerve innervating that muscle. This allows for the investigation of the interaction between the nerve and muscle, observing the transmission of signals and studying the response of the muscle to nerve stimulation. Commonly studied muscles and nerves in this context include the gastrocnemius muscle and the sciatic nerve in animal models.
What muscle is innervated by abdunces nerve?
The abducens nerve (cranial nerve VI) primarily innervates the lateral rectus muscle of the eye. This muscle is responsible for abducting the eyeball, allowing it to move laterally. Dysfunction of the abducens nerve can lead to issues such as strabismus or difficulty in lateral eye movement.
What is the nerve which innervates the vas deferens?
The testicular nerve and the nerve to the cremaster innervate the vas deferens in the spermatic cord.
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)
The nerve that innervates the abductor pollicus brevis in most people is called?
The nerve that innervates the abductor pollicis brevis in most people is the median nerve.
Cranial nerve involved in vision and visual fields?
The optic nerve (purely sensory; carry afferent impulses for vision) Oculomotor (innervates four of the extrinsic eye muscles) Trochlear (innervates an extrinsic eye muscle that hooks through a pulley-shaped ligament in the orbit) Abducens (innervates the muscle that turns abducts the eyeball)
How small can a nerve be?
he trochlear nerve (the fourth cranial nerve, also called the fourth nerve, IV) is a motor nerve (a "somatic efferent" nerve) that innervates a single muscle: thesuperior oblique muscle of the eye.The trochlear nerve is unique among the cranial nerves in several respects. It is the smallest nerve in terms of the number of axons it contains.
