Question

Arrange the following vertebral curves into sequence from the top:
• Sacral curve
• Cervical curve
• Thoracic curve
• Lumbar curve
Choose the correct answer from the options given below:
• C-D-A-B
• B-C-D-A
• A-B-C-D
• D-C-B-A

• A. \(1\)
• B. \(2\)
• C. \(3\)
• D. \(4\)

Hint:

Remember the spinal sequence from top to bottom: \[ \text{Cervical} \rightarrow \text{Thoracic} \rightarrow \text{Lumbar} \rightarrow \text{Sacral} \] A simple mnemonic is: \[ \textbf{C-T-L-S} \]

Answer 1

The Correct Option is B

Concept:
The vertebral column, also known as the backbone or spine, is divided into different regions. These regions form natural curves that help:
• Maintain body balance
• Support body weight
• Absorb shock during movement
• Enable flexibility and upright posture The vertebral column is arranged vertically from top to bottom in a fixed anatomical order. The major spinal curves are:
• Cervical curve
• Thoracic curve
• Lumbar curve
• Sacral curve

Step 1: Understanding the cervical curve.
The cervical curve is located in the neck region and forms the uppermost spinal curvature. It consists of: \[ 7 \text{ cervical vertebrae} \] Since it is nearest to the head, it appears first from the top. Therefore: \[ \text{Cervical curve} = B \]

Step 2: Understanding the thoracic curve.
Below the cervical region lies the thoracic region. It consists of: \[ 12 \text{ thoracic vertebrae} \] This region forms the middle upper back. Therefore: \[ \text{Thoracic curve} = C \]

Step 3: Understanding the lumbar curve.
The lumbar region lies below the thoracic region. It consists of: \[ 5 \text{ lumbar vertebrae} \] This is the lower back region and supports much of the body's weight. Therefore: \[ \text{Lumbar curve} = D \]

Step 4: Understanding the sacral curve.
The sacral curve is located at the base of the spine. It consists of fused sacral vertebrae forming the sacrum. Since it is the lowest spinal curvature: \[ \text{Sacral curve} = A \]

Step 5: Writing the correct top-to-bottom order.
Thus the correct arrangement from top to bottom becomes: \[ \text{Cervical} \rightarrow \text{Thoracic} \rightarrow \text{Lumbar} \rightarrow \text{Sacral} \] Using the given letters: \[ B \rightarrow C \rightarrow D \rightarrow A \] Hence: \[ \boxed{(2)\ B-C-D-A} \]