Question

Signs of brainstem ***** include

A. Unconsciousness.

B. Loss of pupillary reaction to light.

C. Loss of tendon jerks in the arms and legs.

D. Loss of respiratory response to CO2 in the absence of hypoxia.

E. Nystagmus in response to cold water in the external auditory canal.

Answer 1

A. False Consciousness is a function of the cerebral cortical neurones.

B. True The coordinating centres for pupillary reflexes are in the brainstem.

C. False The reflex centres for tendon jerks are in the spinal cord.

D. True Respiratory reflexes are coordinated in the brainstem.

E. False Nystagmus is the normal reflex response of brainstem centres to this stimulus.