Pivot joint occurs at

Options

A. The hip and shoulder joint
B. Between the atlas and the odontoid process of axis
C. Sternoclavicular joint
D. Temporomandibular joint

Answer

### Step-by-Step Solution:

1. **Understanding Joint Types**:
- Joints in the human body can be classified based on their movement capabilities. They can be immovable, slightly movable, or freely movable.

2. **Identifying Joint Structures**:
- Joints can also be classified based on their structure into fibrous joints, cartilaginous joints, and synovial joints.

3. **Defining Pivot Joints**:
- A pivot joint is a type of synovial joint that allows for rotational movement around a single axis.

4. **Analyzing the Options**:
- **Hip Joint**: This is a ball-and-socket joint, allowing movement in multiple directions.
- **Shoulder Joint**: Also a ball-and-socket joint, allowing for a wide range of motion.
- **Atlas and Odontoid Process of Axis**: This is a pivot joint that allows rotation of the head.
- **Sternoclavicular Joint**: This is a saddle joint, allowing for limited movement.
- **Temporal Mandibular Joint**: This is a hinge joint that allows for up and down movement of the jaw.

5. **Selecting the Correct Answer**:
- The only option that describes a pivot joint is the one between the atlas and the odontoid process of the axis. Therefore, the correct answer is option number two.

### Final Answer:
The pivot joint occurs at the atlas and the odontoid process of the axis.

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