The blood pressure, Salivation, pupil movement, etc. are all the involuntary movements. Which part of the brain is responsible for controlling these actions?

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Solution

The involuntary actions include breathing, pumping action of the heart, peristalsis and control of blood pressure. The medulla oblongata is part of the brain stem that controls most of these involuntary actions (The brain stem is the posterior part of the brain that is continuous with the spinal cord).

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Match the following:

$\begin{matrix} 1. T h i s p a r t o f t h e b r a i n t e l l s u s & (i) C e r e b e l l u m w h e t h e r w e a r e h u n g r y o r f u l l 2. T h i s p a r t o f t h e b r a i n i s r e s p o n s i b l e & (i i) M e d u l l a f o r p r e c i s i o n o f v o l u n t a r y a c t i o n s 3. I n v o l u n t a r y a c t i o n s l i k e v o m i t i n g a n d s a l i v a t i o n & (i i i) F o r e - b r a i n a r e c o n t r o l l e d b y t h i s p a r t o f t h e b r a i n \end{matrix}$

Which of the following statements are true about the brain?

(i) The main thinking part of brain is hindbrain.

(ii) Centres of hearing, smell, memory, sight, etc. are located in the forebrain.

(iii) Involuntary actions like salivation, vomiting, blood pressure are controlled by the medulla in the hindbrain.

(iv) Cerebellum does not control posture and balance of the body.

The part of brain which controls the involuntary actions such as heart beat, breathing, blood pressure, etc. is :

(a) pons

(b) medulla

(d) cerebellum

Match the following:

Involuntary actions in the body are controlled by which part of the brain?

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