Shoulder Muscle Oiai

Question 1

Pectoralis Major Actions

Answer 1

All Fibers- Adduction+Medially Rotate of shoulder +Assist to elevate the thorax during forced inhalation

Upper Fibers- Flex + horizontally adduct shoulder

Lower Fibers- elevate shoulder

Question 2

Pectoralis Major Orgin

Answer 2

Medial half of clavicle, sternum, and cartilage of 1-6 ribs

Question 3

Pectoralis major Insertion

Answer 3

Crest of Greater tubercle of humerus

Question 4

Pectoralis Major Nerve

Answer 4

Upper Fibers- Lateral Pectoral

Lower Fibers- Lateral and medial pectoral

Question 5

Pectoralis Minor Action

Answer 5

DABDA Depress +Abduct+ downwardly rotate the S/T joint + with scapula fixed assist 2 elevate the thorax during forced inhalation

Question 6

Pectoralis Minor Orgin

Answer 6

3,4,5 ribs

Question 7

Pectoralis Minor insertion

Answer 7

Medial surface of corocoid process of scapula

Question 8

Pectoralis Minor Nerve

Answer 8

Medial Pectoral w/ fibers from communicating branch of the lateral pectoral

Question 9

Serratus Anterior Actions

Answer 9

WITH ORGIN FIXED
Abduct + Upwardly rotate + Depress the scapula/thoracic joint + Hold the medial border of the scapula against the rib cage –ABHUD

WItH SCAPULA fixed
May act to elevate the thorax during forced inhalation

Question 10

Serratus Anterior ORGIN

Answer 10

External surface of upper 8 or 9 ribs

Question 11

Serratus Anterior insertion

Answer 11

Anterior surface of medial border of scapula

Question 12

Serratus Anterior nerve

Answer 12

Long Thoracic

Question 13

Levator Scapula Action

Answer 13

EDLRE
Unilaterally- elevate + downwardly rotate the scapula

laterally flex + rotate the head and neck

Question 14

Levator Scapula orgin

Answer 14

Transverse process of 1-4 cervical vertebrae

Question 15

Levator Scapula Insertion

Answer 15

medial border of scapula, between superior angle and superior portion of spine

Question 16

Nerves of levator Scapula

Answer 16

Cervical 3,4 and dorsal scapular