6. Rebound phenomenon = Inability to brake (to stop movement promptly):

• Test: Normally, flexion of forearm against resistance is quickly checked when

resistance force is suddenly broken off.

• in cerebellar disease: can not brake movement of limb: forearm flies backward.

7. Adiadokokinesia: inability to perform rapidly alternating opposite movements such as

repeated pronation and supination.

8. Decomposition of movements: Difficulty in actions involving simultaneous motion at more than one joint. (tested by heel-knee test).

9. Nystagmus: tremor of eye ball due to absence of damping function.

• When patient attempts to fix gaze on object to side of his head (Horizontal).

10. Hypotonia: due to marked decrease of facilitatory effect on stretch reflex.

• knee jerk is reduced and pendula

Review: A.F. 2024 0 Physiology for 2nd year medical students Motor Final