click below
click below
Normal Size Small Size show me how
superback
Superficial back muscles- origin, insertion, action, innervation
Question | Answer |
---|---|
Origin of upper trapezius m | external occipital protuberance |
Insertion of upper trapezius m | lateral clavicle, acromion process |
Action of upper trapezius m | elevation, upward rotation of scapula |
Innervation of upper trapezius m | spinal accessory n (motor), C3-C4 (sensory) |
Origin of middle trapezius m | T1-5 |
Insertion of middle trapezius m | spine of scapula |
Action of middle trapezius m | retraction of scapula |
Innervation of middle trapezius m | spinal accessory n (motor), C3-C4 (sensory) |
Origin of lower trapezius m | T6-12 |
Insertion of lower trapezius m | root of spine of scapula |
Action of lower trapezius m | depression of scapula |
Innervation of lower trapezius m | spinal accessory n (motor), C3-C4 (sensory) |
Origin of latissimus dorsi m | vertebrae, ilium, lumbodorsal fascia |
Insertion of latissimus dorsi m | intertubercular groove of humerus |
Action of latissimus dorsi m | extends, adducts upper arm |
Innervation of latissimus dorsi m | thoracodorsal n |
Origin of rhomboid major m | T1- T4 |
Insertion of rhomboid major m | medial border of scapula |
Action of rhomboid major m | retracts, rotates, fixes scapula |
Innervation of rhomboid major m | dorsal scapular n |
Origin of rhomboid minor m | C6-C7 |
Insertion of rhomboid minor m | medial border of scapula |
Action of rhomboid minor m | retracts, rotates, fixes scapula |
Innervation of rhomboid minor m | dorsal scapular n |
Origin of Teres major | lower, axillary border of scapula |
Insertion of teres major m | upper, anterior surface of humerus |
Action of teres major m | assists in extension, adduction, medial rotation of arm |
Innervation of teres major m | lower subscapular n |
Name the rotator cuff muscles | SITS: supraspinatus m, infraspinatus m, teres minor m, subscapularis m |
Origin of supraspinatus m | supraspinous fossa of scapula |
Insertion of supraspinatus m | greater tubercle of humerus |
Action of supraspinatus m | assists in abducting arm |
Insertion of supraspinatus m | suprascapular n |
Origin of infraspinatus m | infraspinatus border of scapula |
Insertion of infraspinatus m | greater tubercle of humerus |
Action of infraspinatus m | lateral rotation of arm |
Innervation of infraspinatus m | suprascapular n |
Origin of teres minor m | axillary border of scapula |
Insertion of teres minor m | greater tubercle of humerus |
Action of teres minor m | laterally rotate arm |
Innervation of teres minor m | axillary n |
Origin of subscapularis m | subscapular fossa on scapula |
Insertion of subscapularis m | lesser tubercle of humerus |
Action of subscapularis m | medial rotation |
Innervation of subscapularis m | suprascapular n |