NEET PG DENTAL EXAM

HEAD NECK

ORBIT NOSE EAR

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
The first vertebrae (C1) that supports the head and allows for movement of the head up and down is the
A
atlas
B
axis
C
transverse process
D
sacrum
Explanation: 

Detailed explanation-1: -C1, the atlas, has no spinous process and articulates with the occipital condyles of the occiput bone of the skull, forming the occipital-atlanto (OA) joint. It connects the skull to the neck, also providing attachment points for some neck muscles. It also functions to bear the weight of the skull, providing support.

Detailed explanation-2: -The C1 atlas is the uppermost cervical vertebra of the spine. It supports the head and-along with the C2 axis, the cervical vertebra just below it-allows the head to nod and rotate from side to side.

Detailed explanation-3: -The first two cervical vertebrae are specialized for articulating with the skull. The atlas (C1) lacks a body and spinous process, and its superior articulating processes (facets) articulate with the occipital condyles of the skull, permitting the head movement used in nodding “yes".

Detailed explanation-4: -Your first vertebra (C1), also called the atlas, is a ring-shaped bone that begins at the base of your skull. It’s named after Atlas, of Greek mythology, who held the world on his shoulders. The atlas holds your head upright.

There is 1 question to complete.