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Human Reflexes
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Gag Reflex
A protective mechanism that triggers a contraction in the back of the throat to prevent choking when the soft palate is touched.
Patellar Reflex
Also known as the knee-jerk reflex, it is a stretch reflex that helps maintain posture and balance, responding to the stretching of the patellar tendon.
Brachioradialis Reflex
This reflex involves tapping the brachioradialis tendon to assess the C5-C6 spinal nerve segments, resulting in flexion/supination of the forearm.
Pupillary Light Reflex
Constriction of the pupil in response to bright light, protecting the retinas by controlling the amount of light that enters the eyes.
Plantar Reflex
A reflex elicited when the lateral aspect of the sole is stroked, causing downward flexion of the toes, assessing neurological function.
Corneal Reflex
This blink reflex is triggered by touching the cornea, indicating proper function of cranial nerves V (trigeminal) and VII (facial), protecting the eyes from injury.
Achilles Reflex
This reflex tests the integrity of the S1-S2 spinal segments and involves plantar flexion of the foot when the Achilles tendon is tapped.
Abdominal Reflex
Contraction of the abdominal muscles upon stroking the skin of the abdomen, assessing integrity of the T8-T12 spinal segments.
Babinski Reflex
Triggered by stroking the sole of the foot, resulting in extension of the big toe, an indicator of neurological function, particularly in infants.
Triceps Reflex
This reflex tests the integrity of the C6-C7 spinal nerves by striking the triceps tendon, causing extension of the elbow.
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