💪👩‍🦳Muscular System, Scalp and Neck Muscles

Epicranius

Broad muscle that covers the top of the skull and consists of the occipitalis and frontalis; also called “occipiofrontalis”

Frontalis

Front (anterior) portion of the epicranius; scalp muscle that raises the eyebrows, draws the scalp forward, and causes wrinkles across the forehead

Platysma

Broad muscle extending from the pectoral and deltoid muscle to the side of the chin; responsible for lowering the lower jaw and lip

Epicranial aponeurosis

Tendon that connects the occipitalis and frontalis muscles

Occipitalis

Back (posterior) portion of the epicranius; muscle that draws the scalp backward

Sternocleidomastoideus

Neck muscle that lowers and rotates the head; originates at the clavicle and inserts at the temporal bone near the ear

Muscular system

Covers and holds the skeletal system in place and moves various parts of the body

Muscles

fibrous tissues that can stretch and contract according to body movements

Myology

The study of the structure, functions, and diseases of the muscular system

HOW MANY muscles are in the body?

MORE than 650

3 TYPES of muscle

Cardiac Muscle

Involuntary muscles

Voluntary muscles

Cardiac Muscle

Is a type of striated muscle found only in the heart

Involuntary Muscles

(Nonstriated) are controlled by the autonomic nervous system and control body functions such as breathing digestion

Muscle tissue can be stimulated by..

1. Massage

2. Electric current therapy

3. Infrared light

4. Dry heat

5. Moist heat

6. Nerve impulses

7. Chemicals

Muscle tissue can be stimulated by..

1. Massage

2. Electric current therapy

3. Infrared light

4. Dry heat

5. Moist heat

6. Nerve impulses

7. Chemicals

3 PARTS of a muscle

Origin

Belly

Insertion

Origin

Part of the muscle that does not move and is anchored to the bone; attached closest to the skeleton

Belly

Middle part of the muscle

Insertion

Moveable part of the muscle anchored to the bone; attached farthest from the skeleton