Contraction of these muscles are regulated by hormones and the autonomic nervous system.
Autonomic nervous system regulates involuntary vital function.
Consists of individual muscle cells called muscle fibers.
These muscle fibers are held together by thin sheets of fibrous connective tissue called fascia.
The fascia and the partitions within the muscle extend to form a strong fibrous band of tissue called a tendon.Tendon attaches the muscle to the bone as it becomes continuous with the periosteum of the bone.
Most of our muscles cross at least one joint, attaching to both of the bones forming the articualtion.
The point of attachment of the muscle to the bone it moves is called the insertion.
Muscle located in the fleshy part of the cheek.
Located above and near the ear. (Open and close your jaws as if you were biting and chewing a piece of meat).
Located at the angle of the jaw, also raises the mandible and closes the jaw. It is used when biting and chewing.
Sternocleidomastoid or Sternomastoid
Extends from the sternum upward along the side of the neck to the mastoid process. ( Bend your neck, bringing your chin toward your chest. Now raise your head and turn your head side to side).
Muscle is a triangular shaped musle that extends across the back of the shoulder, covers the back of the neck, and inserts on the clavicle and scapula.
Muscle originates from the vertebrae of the lower back, crosses the lower half of the thoracic region, and passes between the humerus and scapula to insert on the anterior surface of the humerus.
It forms the posterior border of the axilla.
A large, fan shaped muscle that crosses the upper part of the front of the chest.
It originates from the sternum and crosses over to the humerus.
It forms the anterior border of the axilla.
Covers the shoulder joint.
One of the muscles used for intramuscular injections.
Muscle has two heads, both of which originate from the scapula and insert on the radius.
Muscle has three heads, which originate from the scapula and the humerus and insert onto the olecranon process of the ulna.
Muscle that forms most of the fleshy part of the buttock.
Offers support when an individual is standing.
Causes the thigh to rotate, or turn.
Muscle is a smaller muscle located above the upper outer quadrant of the gluteus maximus muscle.
Helps to abduct the thigh, rotating it outward.
One of those muscles used for intramuscular injection.
Has four muscles that make up one large muscle.
Rectus Femoris: used as an intramuscular inj. site.
Vastus Medialis: Inner side of the femur.
Vastus lateralis: Located on the outer side of the femur. Often used as a site for intramuscular inj.
Vastus Intermedius: Deep in the center of the thigh.
Biceps femoris: hams
Responsible for flexing the the leg on the thigh and also extend the thigh.
Plantar flexes the foot.
Front of the leg.
Turns the foot inward. And dorsiflexes the foot.
Wasting away, without development
Abnormal bending of a joint into a fixed position, usually caused by atrophy and shortening of muscle fibers.