Pectoral Girdle and Arm Muscles Flashcards
what do the shoulder muscles connect?
scapula, clavicle, body wall to the humerus
what is the function of the shoulder muscles?
move the shoulder joints
what is the origin of the deltoid muscle?
Scapula, clavicle
what is the insertion of the deltoid muscle?
Humerus
what innervates the deltoid muscle?
axillary nerve
what is the function of the deltoid on the arm?
Anterior fibres- flex
Middle fibers- abduct
Posterior fibres- extend
what are the shoulder muscles?
deltoid
pectoralis major
latissimus dorsi
teres major
what is the origin of the pectoralis major?
Clavicle
sternum
costal cartilages
where does the pectoralis major insert?
Humerus
what is the function of the pectoralis major?
Flexion, adduction and medial rotation of arm
what is the origin of the latissimus dorsi?
spinous processes of the vertebrae, iliac crest, inferior ribs
where does the latissimus dorsi insert?
Humerus
what is the function of the latissimus dorsi?
Extend, adduct, medially rotate the arm
what is the origin of teres major?
inferior angle of the scapula
where is the insertion of the teres major?
humerus
what is the function of teres major?
Extend, adduct, medially rotate arm
what are the shoulder muscles anterior to posterior?
Pectoralis major
Long tendons of biceps
Letissimus dorsi
Teres major
what are the pectoral girdle muscles?
Trapezius
Levator scapulae
Rhomboids
what is the origin of the trapezius?
occipital bone
where does the trapezius insert?
clavicle
- scapula (spine and acromion)