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The plantar reflex primarily involves the muscles of the foot, particularly the flexor muscles. When the sole of the foot is stimulated, the normal response is for the toes to curl downward, which is facilitated by the flexor digitorum brevis and other intrinsic foot muscles. The reflex is mediated by the spinal cord, specifically the S1 and S2 nerve roots, and is indicative of proper neurological function.
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What is effector muscle for calcaneal reflex action?
The effector muscle for the calcaneal reflex (also known as the Achilles reflex) is the gastrocnemius muscle in the calf. When the Achilles tendon is tapped, it causes a contraction of the gastrocnemius muscle, resulting in plantar flexion of the foot.
What are superficial cord reflexes?
A. abdominal reflex H. plantar reflex
What muscle is involved with the patellar reflex?
The quadriceps group of muscles. Rectus Femoris more specifically.
What are pyramidal signs?
· Increased tone in anti-gravity muscles · No muscle wasting · Paralysis of voluntary movements · Absent abdominal reflex · Babinski's Sign - plantar reflex · Deep tendon reflexes brisk, exaggerated/sustained clonus
What does a normal plantar reflex look like?
It results in flexion of the toes
When testing the plantar reflex in an adult extension of the toes may indicate damage to the somewhere along the reflex arc?
Extension of the toes during plantar reflex testing in an adult may indicate damage to the upper motor neurons, such as the corticospinal tract or brain injury. In a normal plantar reflex response, the toes should flex, not extend. Extension of the toes is known as the Babinski sign and is considered abnormal in adults.
Reflexes classified as somatic reflexes include?
A. abdominal reflex B. Achilles jerk D. corneal reflex E. crossed extensor reflex F. gag reflex G. patellar reflex H. plantar reflex
Is the knee-jerk reflex a simple reflex stretch reflex or a spinal reflex?
The knee-jerk reflex is a type of stretch reflex, which is a type of spinal reflex. It involves the stimulation of sensory neurons in the muscle spindles of the quadriceps muscle, leading to a quick contraction of the muscle in response to a sudden stretch.
What is the muscle that is like the two-bellied muscle that lies over it this muscle is a plantar flexor?
soleus
Why doesn't the patellar reflex happen when your leg is straight?
The patellar reflex, also known as the knee-jerk reflex, doesn't occur when your leg is straight because the muscle involved in the reflex, the quadriceps, is relaxed when the leg is fully extended. The reflex response occurs when the muscle is slightly stretched, triggering a signal to the spinal cord that leads to the reflexive contraction of the quadriceps.
What reflex prevents a muscle from exerting too much tension?
It's called the stretch reflex and involves muscle spindles which are sensorimotor organs located in skeletal muscle.
What movement would you expect to occur during the Achilles reflex?
During the Achilles reflex test, you would expect to see plantar flexion of the foot, where the foot points downwards, in response to tapping the Achilles tendon. This reflex is a protective mechanism that helps maintain posture and balance in the lower extremities.
