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Flexor (Withdrawl) Reflex


Galant's reflex

Hold the baby horizontally and prone in one of your hands. Stimulate one side of the baby’s back approximately 1 cm from the midline along a paravertebral line extending from shoulder to the buttocks. This produces a curving of the trunk toward the stimulated side, with shoulders and pelvis moving in that direction. Pelvic response to stimulation of the back and flanks should be symmetrical. This reflex is absent in transverse spinal cord lesions or injuries.





Rooting reflex

With the baby’s head positioned in the midline and hands held against the anterior chest, stroke with your finger the perioral skin at the corners of the baby’s mouth and the midline of the upper and lower lip. In response, the mouth will open and turn to the stimulated side. This response will also occur with stimulation of the infant’s cheek at some distance from the corners of the mouth. Absence of this reflex indicates severe generalized or central nervous system disease.

Reverberatory(spring) reflex reaction

The arms of healthy neonates, lying on their back (supine position), are flexed. When the fore-arms are streched by the examiner and suddenly released, they "spring back" (reverberate) to their original position.

Babinski reflex vs Planter reflex

同じ刺激でもつま先が反ると(背屈)Babinski reflexで丸々(低屈)するとPlanter reflex。成人では低屈が正常とされる。

Moro reflex

Classic Moro (startle) reflex in 2-week old Amy at home. One of the many reflexes tested at the hospital in newborns. Any startling event (falling sensation, loud noise or here, sudden touch) causes the arms to go straight out and hands wide open. ALMOST as funny as fainting goats. Search that for a hoot.


Crossed Extensor Reflex

Deep Tendon Reflexes and Cerebellar Functions



Grasp response or Palmar reflex

Stimulate the palm of the baby's hands and observe the reflex grasping of your finger. Stroke the sole of the foot, and the toes will flex and curl around your examining finger. Make sure that the response is not inhibited by unintended stimulation of the dorsal aspect of feet and hands. Persistence of the palmar grasp reflex beyond 6 months suggests cerebral dysfunction. It should be noted that babies normally hold their hands clenched during the first month of life. Persistence of the fisted hand beyond 2 months also suggests central nervous system damage.

The Asymmetrical Tonic Neck Reflex (ATNR) フェンシングのポーズ

With the baby in the supine position, turn the head to one side, holding the jaw over the shoulder. The arm and leg on the side to which the head is turned extend, while the opposite arm and leg flex. This response does not normally occur each time this maneuver is performed, and when it is elicted each time it is evoked it should be considered abnormal, at any age. It will persist beyond the time of expected disappearance in major cerebral damage.








The Tendon Reflex

inserted by FC2 system