Pectoralis major and pectoralis minor
anterior
An anterior auricular muscle is a muscle surrounding the auricula, or outer ear.
deep peroneal nerve supplies the tibialis anterior muscle
i believe its tibialis anterior
It is the muscle on the anterior surface of the shoulder and anterior to the pectoantebrachialis.
The sternocleidomastoid muscle is superior to the rectus abdominis muscle. The sternocleidomastoid is located in the neck, while the rectus abdominis is situated in the anterior abdominal wall. Therefore, in terms of anatomical position, the sternocleidomastoid is positioned above the rectus abdominis.
The Serratus Anterior - this muscle is abducts the scapula and is commonly emploed in pushing movements - like punching. As boxers punch alot these muscles are very well developed
lower trapezius, serratus anterior
The pectoralis major muscle forms the anterior border of the axilla.
serratus anterior
flexor digitorum superficialis
The muscle you are referring to is the subscapularis muscle. It originates on the subscapular fossa of the scapula and inserts on the lesser tubercle of the humerus. It is responsible for medial rotation of the shoulder joint.