Muscles of Shoulder Girdle Chapter 4 Movements of

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Muscles of Shoulder Girdle Chapter 4

Muscles of Shoulder Girdle Chapter 4

Movements of the Scapula 1. Elevation 2. Depression 3. Adduction (retraction) 4. Abduction (protraction)

Movements of the Scapula 1. Elevation 2. Depression 3. Adduction (retraction) 4. Abduction (protraction) 5. Downward rotation 6. Upward rotation

Anterior Muscles § Pectoralis Minor § Serratus Anterior

Anterior Muscles § Pectoralis Minor § Serratus Anterior

Pectoralis Minor § Origin: Anterior surface of 3, 4, and 5 ribs § Insertion:

Pectoralis Minor § Origin: Anterior surface of 3, 4, and 5 ribs § Insertion: Coracoid process § Actions: § Abduction of the scapula § Downward rotation of the scapula § Depression of the scapula

Serratus Anterior § Origin: Lateral surface of upper 8 ribs § Insertion: Anterior surface

Serratus Anterior § Origin: Lateral surface of upper 8 ribs § Insertion: Anterior surface of medial border and inferior angle of scapula. § Actions: § Abduction of the scapula § Upward Rotation of the scapula

Posterior Muscles § Levator Scapluae § Trapezius § Rhomboid

Posterior Muscles § Levator Scapluae § Trapezius § Rhomboid

Levator Scapulae § Origin: Transverse processes of the first 4 cervical vertebrae. § Insertion:

Levator Scapulae § Origin: Transverse processes of the first 4 cervical vertebrae. § Insertion: Superior angle and medial border of the scapula. § Actions: Elevation of the scapula

Trapezius § Origin: Occipital bone, ligamentum nuchae, spinous process of the C 7 and

Trapezius § Origin: Occipital bone, ligamentum nuchae, spinous process of the C 7 and all Thorasic vertebrae § Insertion: § 1. Lateral 1/3 of clavicle. § 2. Top of Acromion process. § 3. Upper border of spine of the scapula. § 4. Medial surface of spine of the scapula. § Actions: § Upper – elevation of the scapula § Middle – elevation, upward rotation, & adduction of the scapula § Lower – depression, AC adduction and upward rotation of the scapula

n Upper – elevation n Middle – elevation, upward rotation, & adduction n Lower

n Upper – elevation n Middle – elevation, upward rotation, & adduction n Lower – depression, adduction and upward rotation

Pull of the lower fibers Movement of scapula

Pull of the lower fibers Movement of scapula

Rhomboid (major and minor) § Origin: Ligamentum nuchea and spinous process of C 1

Rhomboid (major and minor) § Origin: Ligamentum nuchea and spinous process of C 1 -7 and 2 -5 T § Insertion: Medial border of the scapula § Actions: § Adduction of the scapula § Downward rotation of the scapula § Elevation of the scapula

Subclavius § Origin: Superior aspect of first rib § Insertion: Inferior aspect at mid-clavicle

Subclavius § Origin: Superior aspect of first rib § Insertion: Inferior aspect at mid-clavicle § Action § Depression of the scapula § Stabilization of the scapula

Scapula Adduction Abduction Upward Rotation Trap Pect Minor Serratus (middle) Ant. Trap Serratus Trap

Scapula Adduction Abduction Upward Rotation Trap Pect Minor Serratus (middle) Ant. Trap Serratus Trap (lower) Ant. (middle) Rhomboids Trap (lower) Downward Rotation Pect Minor Rhomboid

Name the muscle. Rhomboid Name the action Adduction of scapula

Name the muscle. Rhomboid Name the action Adduction of scapula

Name the muscle. Pectoralis minor Name the action Depression of the scapula

Name the muscle. Pectoralis minor Name the action Depression of the scapula

Name the muscle. Trapezius Name the action Adduction of the scapula Name the action

Name the muscle. Trapezius Name the action Adduction of the scapula Name the action Upward rotation

Name the muscle. Levator scapula Name the action Elevation of the scapula

Name the muscle. Levator scapula Name the action Elevation of the scapula

Name the muscle. Serratus Anterior Name the action Abduction of scapula

Name the muscle. Serratus Anterior Name the action Abduction of scapula

? Latissimus Dorsi

? Latissimus Dorsi