Shoulder Muscle Oiai Flashcards
Pectoralis Major Actions
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
Pectoralis Major Orgin
Medial half of clavicle, sternum, and cartilage of 1-6 ribs
Pectoralis major Insertion
Crest of Greater tubercle of humerus
Pectoralis Major Nerve
Upper Fibers- Lateral Pectoral
Lower Fibers- Lateral and medial pectoral
Pectoralis Minor Action
DABDA Depress +Abduct+ downwardly rotate the S/T joint + with scapula fixed assist 2 elevate the thorax during forced inhalation
Pectoralis Minor Orgin
3,4,5 ribs
Pectoralis Minor insertion
Medial surface of corocoid process of scapula
Pectoralis Minor Nerve
Medial Pectoral w/ fibers from communicating branch of the lateral pectoral
Serratus Anterior Actions
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
Serratus Anterior ORGIN
External surface of upper 8 or 9 ribs
Serratus Anterior insertion
Anterior surface of medial border of scapula
Serratus Anterior nerve
Long Thoracic
Levator Scapula Action
EDLRE
Unilaterally- elevate + downwardly rotate the scapula
laterally flex + rotate the head and neck
Levator Scapula orgin
Transverse process of 1-4 cervical vertebrae
Levator Scapula Insertion
medial border of scapula, between superior angle and superior portion of spine
Nerves of levator Scapula
Cervical 3,4 and dorsal scapular
