Which statement is wrong about the function of brain?

Options

A. Hypothalamus mainly controls AN.S.
B. Voluntary muscle activity is started by cerebellum
C. Medulla oblongata regulates involuntary activity of our body
D. Thalamus acts as major co-dinating centre for sensory and motor signalling.

Answer

To determine which statement is wrong about the function of the brain, we will analyze each statement provided in the options.

### Step-by-Step Solution:

1. **Analyze the First Statement:**
- **Statement:** Hypothalamus mainly controls the autonomic nervous system.
- **Analysis:** This statement is correct. The hypothalamus plays a crucial role in regulating the autonomic nervous system, integrating inputs from the limbic system to maintain homeostasis.

2. **Analyze the Second Statement:**
- **Statement:** Voluntary muscle activity is started by the cerebellum.
- **Analysis:** This statement is incorrect. The cerebellum is primarily responsible for the coordination and fine-tuning of voluntary movements, not the initiation of voluntary muscle activity. The primary motor cortex in the frontal lobe initiates voluntary muscle activity.

3. **Analyze the Third Statement:**
- **Statement:** Medulla oblongata regulates involuntary activity of our body.
- **Analysis:** This statement is correct. The medulla oblongata is responsible for regulating vital involuntary functions such as respiration, heart rate, and blood pressure.

4. **Analyze the Fourth Statement:**
- **Statement:** Thalamus acts as the major coordinate center for sensory and motor signaling.
- **Analysis:** This statement is correct. The thalamus serves as a relay station for sensory and motor signals to the cerebral cortex.

5. **Analyze the Fifth Statement:**
- **Statement:** Adherent acts as the relay center.
- **Analysis:** This statement is somewhat vague, but if it refers to the thalamus (often confused with "adherent"), it is correct. The thalamus does act as a relay center for sensory information.

### Conclusion:
The wrong statement about the function of the brain is the second statement: "Voluntary muscle activity is started by the cerebellum."

### Final Answer:
The incorrect statement is: **Voluntary muscle activity is started by the cerebellum.**

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