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What is the nerve supply to the larynx?
The larynx receives its nerve supply from the vagus nerve (cranial nerve X). Specifically, the recurrent laryngeal nerve innervates the intrinsic muscles of the larynx involved in phonation, while the external branch of the superior laryngeal nerve supplies the cricothyroid muscle.
Which plexus supplies motor movement to the posterior of legs and thighs?
The sacral plexus supplies motor movement to the posterior of the legs and thighs. It is formed by the lumbosacral spinal nerves and gives rise to nerves like the sciatic nerve, which innervates many muscles in this region.
What two prominent muscles have been affected if your right accessory nerve was severed in an accident and there was muscle atrophy?
The trapezius and sternocleidomastoid muscles would be affected if the right accessory nerve was severed. These muscles may show signs of atrophy due to the loss of nerve supply, leading to weakness and decreased function in shoulder movement and head rotation.
What muscle is paralyzed if sciatic nerve is severed?
If the sciatic nerve is severed, the muscles controlled by it would be affected. These include the muscles of the lower leg and foot, such as the hamstrings, calf muscles, and muscles that control movement of the foot and toes. Injury to the sciatic nerve can result in weakness or paralysis of these muscles on the affected side.
What does no elbow reflex indicate?
A lack of elbow reflex can indicate a potential issue with the nerve supply to the muscles in the arm or a problem with the specific reflex arc involving the radial nerve. This could be due to conditions such as nerve damage, compression, or neurological disorders that may require further evaluation by a healthcare professional.
