Question

The muscles responsible for protraction of the scapulothoracic (ST) joint include the ________.

Answer 1

The pectoralis minor and serratus anterior muscles are responsible for the protraction of the scapulothoracic joint, facilitating forward movement of the shoulder.

Step-by-step explanation:

The muscles responsible for the protraction of the scapulothoracic (ST) joint are primarily the pectoralis minor and the serratus anterior. Protraction refers to the movement of the shoulder blade moving forward and around the rib cage. The pectoralis minor functions by pulling the scapula forward and downward, while the serratus anterior contracts to pull the scapula forward and around the rib cage. Together, these muscles work to protract the scapula, moving it away from the vertebral column and pushing the shoulder forward. This action is crucial in many upper limb movements, such as pushing against a surface or reaching outwards.

Answer 2

The muscles responsible for protraction of the scapulothoracic (ST) joint include the serratus anterior and the pectoralis minor.

Step-by-step explanation:

The serratus anterior and the pectoralis minor are the muscles responsible for protracting the scapulothoracic joint by moving the scapula forward.

Protraction of the scapula occurs when the shoulder is moved forward, such as when pushing against something or throwing a ball.

The serratus anterior plays a significant role in this movement by pulling the scapula forward and around the rib cage.

The pectoralis minor assists in protracting the scapula by drawing it anteriorly and downward against the thoracic wall.