Reflexes in Human Flashcards
(25 cards)
With a clean piece of absorbent cotton, touch the cornea (avoid the pupil). Note and record the response.
Corneal or Conjunctival Reflex
Pass a hand rapidly in front of the subject’s face. Note and record the response.
Blink Reflex
a. Light or Photopupillary Reflex
b. Accommodation Reflex
c. Pupillary Skin Reflex
Pupillary Reflexes
Have your partner sit facing the light. Note the size of the pupil. Let the student close his/her eyes and cover them with his/ her hands. After several seconds, uncover and let the subject open his/her eyes and stare directly at the light. Immediately take note of the change that occurs in the size of the pupil.
Light or Photopupillary Reflex
While your partner is looking at a distant object, note the position of the eyeballs. Let him/her look at a near object and note the change in the position of the eyeballs.
Convergence Reflex
Pinch the cheeks of your partner, and observe what happens to the pupils of the eyes.
Pupillary Skin Reflex
Corneal or Conjunctival Reflex
Blink Reflex
Pupillary Reflexes
Convergence Reflex
Eye reflexes
This is the ability of the eyes to focus on far objects at different distances to produce clear vision. The ciliary muscle is the most important muscle of accommodation. Have your partner sit away from the light while looking alternately at far and near objects without changing the light. Note the size of the pupil and the change that will occur.
Accommodation Reflex
The tendinous attachments of muscles have special sensory receptors. If these receptors are stimulated by a sudden, quick stretch, nerve impulses pass up to the spinal cord through a synapse to the anterior motor neuron to the muscle and a quick, jerking contraction results.
Tendon or Stretch Reflexes
This is elicited with the student comfortably seated with one leg crossed over the other. The crossed leg should be relaxed. Palpate for the patellar tendon. Then, strike it using a rubber mallet or reflex hammer.
Patellar or Knee Reflex
Grasp the arm of your partner close to the elbow joint with your left thumb. Press the tendon of the biceps muscle. Tap the thumb, and note the contraction of the biceps and flexion of the forearm.
Biceps Reflex
Flex the arm of your partner at the elbow with the joint pointing outward. Tap the triceps tendon just above the olecranon. Note the extension of the elbow.
Triceps Reflex
Have your partner kneel with one leg on a chair with the foot hanging freely over the edge of the chair. Tap the tendon of the Achilles and note the movement of the foot.
You sent
Ankle Jerk or Tendon of Achilles Reflex
Tap the tendon of the flexor of the wrist about one inch above the joint. Note the flexion of the wrist.
Wrist Reflex
With a clean piece of twisted cotton, tickle the interior of the nostril, What is produced?
Sneezing Reflex
Tightly stroke the palm of the student, and note that this produces flexion of the fingers.
Palmar Reflex
Stroke the skin of the student at the center border of the rectus abdominis or sides of the abdomen. Observe the drawing-in of the abdominal wall.
Abdominal Reflex
Touch the back of the pharynx with a sterile wooden tongue depressor. Note the response.
Pharyngeal Reflex
Lightly scratch the sole of the foot. Observe the reflex response of the toes.
Plantar Reflex
Scratch the skin of the forearm firmly with a blunt, rough instrument, such as a probe and note the response.
Axon Reflex
This reflex is observed among infants and is absent in adults. It is elicited by sharply stroking the outer edge of the sole of the foot with a rough object, such as a blunt probe. A positive result shows fanning of the toes with the dorsal extension of the big toe. A negative response is plantar flexion of the toes.
Babinski’s Reflex
Touch the palate, and the muscles of the region will contract.
Palatal Reflex
This is elicited by stroking the skin from below down to the upper abdominal wall. Drawing-in of the skin of the epigastrium can be observed.
Epigastric Reflex
This is observed in males. Stroke the inner surface of the thigh lightly and elevation of the testes while stroking can be observed.
Cremasteric Reflex
