Limbic system is concerned with all of the following, except

Options

A. Regulation of sexual behaviour
B. Expression of emotional reactions
C. Conversion of short term memory to long term memory
D. Regulation of breathing

Answer

To solve the question regarding the functions of the limbic system, we follow these steps:

### Step 1: Understand the Limbic System
The limbic system is a complex set of structures in the brain that is primarily involved in emotions, behavior, long-term memory, and olfaction (sense of smell). It is located on both sides of the thalamus, beneath the temporal lobe of the cerebrum.

**Hint:** Recall the primary functions associated with the limbic system, such as emotions and memory.

### Step 2: Analyze the Given Options
We need to evaluate each option provided in the question to determine which function is not associated with the limbic system.

1. **Regulation of sexual behavior**: The limbic system is involved in regulating various behaviors, including sexual behavior.

**Hint:** Think about how emotions and behaviors are interconnected in the brain.

2. **Expression of emotional reactions**: The limbic system plays a significant role in processing and expressing emotions.

**Hint:** Consider how the limbic system is often referred to as the emotional center of the brain.

3. **Conversion of short-term memory to long-term memory**: The limbic system is also involved in memory processing, particularly in the formation of long-term memories.

**Hint:** Reflect on how memories are stored and the brain regions involved in this process.

4. **Regulation of breathing**: This function is not associated with the limbic system. The regulation of breathing is primarily controlled by the medulla oblongata, which is part of the brainstem.

**Hint:** Identify which part of the brain is responsible for autonomic functions like breathing.

### Step 3: Identify the Correct Answer
After analyzing all the options, we conclude that the limbic system does not regulate breathing. Therefore, the correct answer is the option that states "regulation of breathing."

**Final Answer:** The limbic system is concerned with all of the following, except the regulation of breathing.