Which of the following is a large, deep muscle that protracts the scapula during punching? a. serratus anterior, b. rhomboids, c. levator scapulae, d. subscapularis.

Verified step by step guidance

1. Identify the function of each muscle listed in the options.
2. Understand that protraction of the scapula involves moving the scapula forward and around the rib cage.
3. Recognize that the serratus anterior is known for its role in protracting the scapula, especially during actions like punching.
4. Consider the anatomical position and attachment points of the serratus anterior, which originates on the upper ribs and inserts along the medial border of the scapula.
5. Conclude that the muscle responsible for protracting the scapula during punching is the serratus anterior.

Key Concepts

Scapular Protraction

Scapular protraction refers to the movement of the scapula away from the spine, which is essential for actions like punching. This movement allows for greater reach and power in the upper limb, making it crucial in various athletic and functional activities.

Serratus Anterior Muscle

The serratus anterior is a large, fan-shaped muscle located on the lateral aspect of the thorax. It plays a key role in protracting the scapula, stabilizing it against the thoracic wall, and facilitating movements such as punching and pushing.

Muscle Function in Upper Body Movements

Understanding muscle function in upper body movements is vital for analyzing actions like punching. Different muscles contribute to various movements, and knowing which muscles are responsible for specific actions helps in identifying the correct answer in questions related to anatomy and physiology.