Which of the following joints is formed betweeen atlas and axis vertebrae ?

Options

A. Saddle joint
B. Fibrous joint
C. Cartilaginous joint
D. Pivot joint

Answer

To determine which joint is formed between the atlas and axis vertebrae, we can follow these steps:

### Step-by-Step Solution:

1. **Identify the Vertebrae**:
- The atlas (C1) and axis (C2) are the first two cervical vertebrae in the human spine.

2. **Understand Joint Types**:
- There are two main categories of joints: fibrous and synovial.
- Synovial joints are further classified into six types: ball and socket, hinge, condyloid, pivot, gliding, and saddle joints.

3. **Focus on the Atlas and Axis**:
- The atlas and axis vertebrae are unique as they allow for a range of motion in the neck, particularly rotation.

4. **Identify the Specific Joint**:
- The joint formed between the atlas and axis is classified as a pivot joint. This type of joint allows for rotational movement.

5. **Conclusion**:
- Therefore, the joint formed between the atlas and axis vertebrae is a **pivot joint**.

### Final Answer:
The joint formed between the atlas and axis vertebrae is a **pivot joint**.

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