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UE Muscle OAINs

origin, insertions, actions, and innervation of muscles

QuestionAnswer
Origin of the pectoralis major medial half of clavicle, manubrium and body of sternum, and cartilages of first 6-7 ribs
insertion of the pectoralis major crest of greater tubercle of humerus
action of the pectoralis major flexion, medial rotation and horizontal adduction of the shoulder. Scapular protraction and depression
innervation of the pectoralis major lateral pectoral
origin of the pectoralis minor ribs 2-5
insertion of the pectoralis minor medial border of the coracoid process
action of the pectoralis minor Scapular: downward rotation, protraction, and depression
innervation of the pectoralis minor medial pectoral
origin of the serratus anterior ribs 1-8
insertion of the serratus anterior medial border, costal surface of the scapula
action of the serratus anterior Scapular upward rotation, protraction and depression
innervation of the serratus anterior long thoracic
trapezius: origin superior nuchal line and external occipital protuberance, ligamentum nuchae, spinous process and supraspinous ligaments of C7 an all thoracic vertebrae
trapezius insertion upper: lateral 1/3 of clavicle, middle: acromion and upper lip of the spine of the scapula lower: spine of the scapula
trapezius action upper: scap elevation middle: scap retraction lower: scap depression upper and lower: upward rotation of the scap
trapezius innervation: cranial nerve XI (spinal accessory nerve)
Rhomboid major and minor origin ligamentous nuchae and spinous process of C7-T5
Rhomboid major and minor insertion medial border of scap
Rhomboid major and minor action scap: adduction, elevation, and downward rotation
Rhomboid major and minor innervation dorsal scapular nerve
levator scapulae origin transvers process of C1-4
levator scapulae insertion medial border of scap between superior angle and root of the spine
levator scapulae action scap elevation and downward rotation
levator scapulae innervation Ventral rami of spinal nerves (C3-4) and the dorsal scapular nerve
SCM origin manubrium and medial potion of the clavicle
SCM insertion mastoid process of the temporal bone
SCM action U/L: same side flexion ,and contralateral rotation
Latissimus dorsi origin spinous process of 7th through 12th thoracic vrtebrae, through fascia from the lumbar and sacral vertebrae, last 3-4 ribs and slip from inferior angle of scapula
Lat dorsi insertion intertubercular groove of the humerus
lat dorsi action medial rotation, adduction, and extension of the shoulder joint
lat dorsi innervation thoracodorsal
deltoid origin ant: lateral end of clavicle middle: acromoin posterior: spine of the scapula
deltoid insertion deltoid tuberosity of the humerus
deltoid action abduction of shoulder anterior: flexion of shoulder posterior: extension of shoulder
deltoid innervation axillary
teres major origin inferior angle of scapula
teres major insertion crest of lesser tubercle of humerus
teres major action Shoulder: med rot, ext, add
teres major innervation lower subscapular
Coracobrachialis origin coracoid process of scapula
coracobrachialis insertin medial aspect of middle shaft of the humerus
coracobrachialis action flexion of arm
coracobrachialis innervation musculocutaneous
subscapularis origin subscapular fossa of scapula
subscapularis insertion lesser tubercle of the humerus
subscapularis action shoulder: med rot and add
subscapularis innervation upper and lower subscapular nerves
supraspinatus origin supraspinatus fossa of scapula
supraspinatus insertion upper facet of greater tubercle of humerus
supraspinatus action shoulder abduction up to 15 degreea
supraspinatus innervation suprascapular
infraspinatus origin infraspinatus fossa of scapula
infraspinatus insertion middle facet of greater tubercle of humerus
infraspinatus action lat rot of shoulder
infraspinatus innervation suprascapular
teres minor origin lateral border of scapula
teres minor insertion lower facet of greater tubercle of humerus
teres minor action lat rotation of shoulder
teres minor nerve axillary
long head of biceps origin supraglenoid tubercle of scapula
long head of biceps insertion bicipital tuberosity of the radius
long head of biceps action flexion of elbow, supination of forearm, flexion of shoulder
long head of biceps innervation musculocutaneous
short head of biceps origin coracoid process of scapula
short head of biceps insertion bicipital tuberosity of the radius
short head of biceps action flexion of elbow, supination of forearm, flexion of the shoulder
brachialis origin distal aspect of the anterior surface of the humerus
brachialis insertion coronoid process and tuberosity on the proximal ulna
brachialis action elbow flexion
brachialis innervation: musculocutaneous
lateral head of triceps origin posterior humerus, superior and lateral to the radial groove
lateral head of triceps insertion olecranon process of ulna
lateral head of triceps action extends shoulder and elbow
lateral head of triceps innervation radial
long head of triceps origin infraglenoid tubercle of scapula
long head of triceps innervation olecranon process of ulna
long head of triceps action extends shoulder and elbow
long head of triceps innervation radial
medial head of triceps origin posterior humerus, inferior and medial to the radial groove
medial head of triceps insertion olecranon process of ulna
medial head of triceps action extends shoulder and elbow
medial head of triceps innervation radial
brachioradialis origin upper 2/3 of the lateral supracondylar ridge of the humerus
brachioradialis insertion near styloid process at the distal radius
brachioradialis action elbow flexion especially in mid-prone position
brachioradialis innervation radial
anconeus origin posterior side of the lateral epicondyle of the humerus
anconeus insertion between the olecranon process and proximal surface of the posterior side of the ulna
anconeus action weak elbow extensor
anconeus innervation radial
Created by: ecosio
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