shoulder
Sternocleomastoid
aids in flexion of the head and the neck
Individually rotation of the head to the opposite side. Together , flexion of the neck.
semispinalis capitis splenius capitis longismuss capitis spinalis capitis trapezius
any muscle that assist in shoulder extention posterior fibor of deltoid Triceps long head
sternocleidomstoid
sternocleidomstoid
The Pectoralis major (clavicular head), coracobrachialis, and biceps brachia are the synergists for shoulder flexion. For horizontal flexion, the Anterior deltoid is the synergist muscle.
The muscle that is responsible for the movement of the head from left to right.
Sternocleidomastoid and the Scalenes are Synergists, which mean that they work together to provide the same movements (flexion, rotation and lateral flexion of the head and neck)An Antagonist is a muscle that does the opposite movements. In this case, Antagonists of the Scalenes would be your posterior neck muscles, such as:Upper TrapeziusSplenius CapitusSplenius CervicisSemispinalis Capitis, etc
Triceps Brachii Muscle is Latin for "three -headed arm muscle." It is the muscle in the back of the upper arm responsible for the extension of the elbow joint. It is composed of three main muscle bundles: the long head, the lateral head and the medial head.
the trapesious muscle
A pair of large neck muscles called sternocleidomastoids is responsible for turning the head.