Muscles in the Shoulder, Chest, Arm, Stomach, and Back

Shoulder Muscles  Trapezius Traps  Deltoid Delts

Trapezius (Traps)  Function: Raises head and shoulders Origin: back of the neck and upper vertebrate Insertion: clavicle and scapula

Deltoid (Delts)  Function: Raises the upper arm Origin: the spine of the scapula and the clavicle Insertion: the top of the humerus

Back  Teres Major  Latissimus Dorsi Lats  Erector Spinae  Rhomboids

Teres Major  Function: rotation of the humerus Origin: scapula Insertion: humerus

Latissimus Dorsi (Lats)  Function: moves the arm backward Origin: lumbar vertebrae Insertion: humerus

Erector Spinae  Function: straightens the back Origin: lower thoracic vertebrae and top of pelvis Insertion: back of ribs and upper thoracic vertebrae

Rhomboids  Function: (deep muscle) extends the scapula (under the teres major) Origin: thoracic vertebrae Insertion: front of scapula

Chest Muscles  Pectoralis Major Pecs  Serratus Anterior

Pectoralis Major (Pecs)  Function: Moves the arm across the chest Origin: sternum and clavicle Insertion: medial and lateral top of the humerus

Serratus Anterior  Function: Moves the scapula forward Origin: upper ribs / side of the ribs Insertion: scapula

Quiz 1.Name one of the two parts of muscle. 2.The place where a muscle is anchored is called what? 3.The temporalis and the masseter work together to perform what function? 4.Name two of the six muscles of the shoulder and back. 5.What muscle group works in a pair with your Lats (Latissimus Dorsi)?

Quiz/Review 1.Name one of the two parts of muscle. Tendon, Belly 2.The place where a muscle is anchored is called what? Origin 3.The temporalis and the masseter work together to perform what function? Move the lower jaw 4.Name two of the six muscles of the shoulder and back. Traps, Delts, Teres Major, Lats, Erector Spinae, Rhomboids 5.What muscle group works in a pair with your Lats (Latissimus Dorsi)? Pecs (Pectoralis Major)

Arm Muscles  Biceps  Triceps  Brachioradialis  Flexor Carpi  Extensor Carpi

Biceps  Function: flexes arm (anterior) Origin: side of the scapula Insertion: radius/ulna

Triceps  Function: extends/straight ens arm (posterior) Origin: side of the scapula and the humerus Insertion: upper ulna

Brachioradialis  Function: flexes the elbow Origin: lateral epicondyle of humerus Insertion: radius

Flexor Carpi  Function: Closes the hand and fingers and flexes the wrist (anterior) Origin: medial epicondyle of humerus Insertion: metacarpals

Extensor Carpi  Function: Opens the hand and fingers and extends the wrist (posterior) Origin: lateral epicondyle of humerus Insertion: metacarpals

Stomach & Abdomen  Rectus Abdominis Abs  External Obliques  Internal Obliques

Rectus Abdominis  Function: flexes trunk of the body & pulls ribs to pelvis  Important for posture Origin: front of pelvis Insertion: front of ribs

Obliques  External Oblique: flexes the trunk of the body and twists torso Origin: lower ribs Insertion: top of pelvis  Internal Oblique: Same as external, except a deeper set of muscles