Question

The joint between the atlas and axis is called as
(a)Pivot joint
(b)Hinge joint
(c)Saddle joint
(d)Angular joint

Answer 1

Hint: A type of synovial joint present in the neck region is the joint between the atlas and the axis. This joint is sometimes referred to as a rotary joint, trochoid joint, or atloaxoid joint. The two forearm bones (the ulna and the radius) curve around each other utilizing this joint.

Complete answer:
A pivotal joint type is a joint present between the atlas/axis. The pivot joint is a joint in the vertebrate anatomy that only permits rotating movement. An example of this is the joint between the atlas and the axis, directly below the skull, which allows the head to be rotated from side to side. In neck movement, the pivot joint supports. They spin on one another.
The atlas is the first cervix bone under the head, while the second bone is the axis.
The bone of the atlas is named after the Greek god (Atlas), who on his shoulders supported the globe. The axis has what is known as the odontoid system that rotates around the atlas. The ligaments that allow the pivot joint to stabilize and strengthen are referred to as capsular; atlantoaxial anterior and posterior; and transverse ligaments.
Pivot joints, for example, enable one to turn the palm of one's hand upward or downward after bending the elbow by rotating the forearm.

Additional Information: -A hinge joint is a common synovial joint class that includes the joints of the ankle, elbow, and knee. Between two or more bones, hinge joints are formed where the bones can only travel along one axis to bend or stretch.
-A saddle joint is a synovial joint where one of the bones that form the joint is shaped like a saddle, sitting on it like a rider on a horse with the other bone.
A joint is designated as an angular joint on the basis of its motion. The angle between joints is either increased or reduced during angular movement. There is this sort of joint between the metacarpal and the phalange.
So, the correct answer is, ‘Pivot joint’.

Note: A pivot joint is a synovial joint in which there is a central bony cylinder at the ends of two bones where one of its ends meets; the other end is a bone and ligament ring (or ring-like structure). At certain joints, the cylinder rotates inside the loop. The Ring rotates in other joints around the cylinder.