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Multiple Choice
Which of the following is a primary function of the midbrain?
A
Control of heart rate and blood pressure
B
Production of cerebrospinal fluid
C
Regulation of visual and auditory reflexes
D
Coordination of voluntary muscle movements
Verified step by step guidance
1
Understand the role of the midbrain: The midbrain is a part of the brainstem located between the forebrain and the hindbrain. Its primary functions include processing visual and auditory information and coordinating reflexive responses to these stimuli.
Eliminate incorrect options: The control of heart rate and blood pressure is primarily managed by the medulla oblongata, not the midbrain. Similarly, the production of cerebrospinal fluid is a function of the choroid plexus within the ventricles of the brain, not the midbrain.
Focus on reflex regulation: The midbrain contains structures such as the superior colliculi (involved in visual reflexes) and the inferior colliculi (involved in auditory reflexes). These structures help regulate reflexive responses to visual and auditory stimuli, such as turning your head toward a sudden sound or light.
Consider voluntary muscle movement: Coordination of voluntary muscle movements is primarily controlled by the cerebellum and motor areas of the cerebral cortex, not the midbrain.
Conclude the correct function: Based on the above analysis, the primary function of the midbrain is the regulation of visual and auditory reflexes, as it houses the superior and inferior colliculi responsible for these processes.