Question

Which of the following muscles draws the lower jaw, tongue, and head backwards?
A) Proctor
B) Retractor
C) Abductor
D) All of these

Answer 1

Hint:
Skeletal muscles are usually attached to bone by tendons composed of connective tissue. This connective tissue also ensheaths the entire muscle and is called epimysium. Skeletal muscles consist of numerous bundles called fascicles.

Complete step by step solution:
Abductor muscles are the muscles that make the part of the body away from the midline. For example: if toes and fingers are spread then the abductor's muscles are used. These muscles are also present at the lateral side of the thigh and move the thigh away from the boy’s midline. Some of these muscles are piriformis, superior gemellus, inferior gemellus, tensor fasciae latae, Sartorius, gluteus medius, and gluteus minimus muscles. Refractor muscles are those that draw the body in the reverse direction. For example the movement of the jaw tongue and head i.e., both in the forward and backward direction. Weak abductor muscles are caused by an acute injury or chronic overuse. Tendonitis of one of the abductor's muscles can also be used if nearby supporting muscles are too weak or too strong. Proctor's muscles pull a part forward which is antagonistic to retractor muscles. For example Lateral and anterior movement of muscles of the scapula along with the chest. Collectively all three options are not correct.

Option ‘B’ is correct

Note:
The contraction of the lateral pterygoid and contralateral temporal muscle introduces lateral movements. The mastication process is mediated by the tongue and it also moves the food to the correct position to chew it properly.