Arms : Muscles Flashcards
Infraspinatus
Muscle in the infraspinous fossa of scapula. A rotator cuff.
A: circumduction of humerus O: infraspinous fossa of scapula
I: greater tubercle of humerus
Supraspinatus
Superior muscle on in supraspinous fossa. A rotator cuff.
A: circumduction of humerus O: supraspinous fossa of scapula
I: greater tubercle of humerus
Teres minor
Muscle inferior to Infraspinatus. Insertion is OVER triceps brachii long head. A rotator cuff.
A: circumduction of humerus I: greater tubercle of humerus
Subscapularis
Muscle on the back side of the scapula facing ribs.
A: circumduction of humerus O: subscapular fossa of scapula I: lesser tubercle of humerus
Teres major
Muscle inferior to teres minor. Muscle connects UNDER triceps brachii long head.
A: adduction of humerus I:Intertubercular sulcus of humerus
Rhomboid major
Muscle next to spine but inferior to rhomboid minor.
A: retraction of scapula I: medial border of scapula
Rhomboid minor
Muscle next to spine but superior to rhomboid major.
A: retraction of scapula I: medial border of scapula
Serratus anterior
By external abdominal oblique. Jagged muscle.
A: protraction of scapula I: medial border of scapula
Latissimus dorsi
“Lats” muscles. Side muscles. Deeper
A: adduction of humerus O: lumbar vertebrae I: Intertubercular sulcus of humerus.
Trapezius
Big triangular muscle all across back. Most superficial.
A: elevation, depression, and retraction of scapula O: cervical and thoracic vertebrae I: spine of scapula
Deltoid
Shoulder muscle. A: abduction of humerus. O: acromion and spine of scapula I: deltoid tuberosity of humerus
Pectoralis major
Most superficial pec muscle. A: adduction and flexion of humerus O: sternum and clavicle I: Intertubercular sulcus of humerus
Pectoralis minor
Smaller pec muscles deeper. A: protraction of scapula I: coracoid process of scapula
Triceps brachii long head
Articulates with teres minor. A: extends elbow (forearm) I: Olecranon process of ulna
Triceps brachii lateral head
Lateral to long head. A: extends elbow (forearm) I: Olecranon process of ulna
Triceps brachii medial head
Medial and deep. A: extends elbow (forearm) I: Olecranon process of ulna
Biceps brachii
Biggest and most anterior. A: flexes elbow; supinates forearm I: radial tuberosity of radius
Brachialis
Deeper to biceps brachii. Under biceps brachii. A: flexes elbow O: shaft of humerus I: Coronoid process of ulna
Coracobrachialis
Skinny muscle from armpit/ anterior. A: adduction of humerus O: coracoid process of scapula
Cubital fossa
Hollow spot in elbow space. Anterior
Pronator teres
More proximal muscle to palmaris longus. Anterior and superficial. A: pronates forearm
Flexor carpi radialis
Muscle anterior on radial side. Superficial.
A: flexes wrist, radial deviation of hand O: medial epicondyle of humerus
Palmaris longus
Muscle in between flexor carpi radialis and ulnaris. Anterior and superficial.
A: flexes wrist O: medial epicondyle of humerus
Flexor carpi ulnaris
Muscle anterior and superficial on ulnar side. A: flexes wrist, ulnar deviation of ulna O: medial epicondyle of humerus
Flexor digitorum superficialis
Muscle deeper than flexor carpi muscles. Directly underneath
A: flexes fingers
Flexor digitorum profundus
Deep muscle more on lateral side of anterior side.
A: flexes fingers
Flexor pollicis longus
Muscle deep on medial side anterior side.
A: flexes thumb
Pronator quadratus
Square muscle close wrist. Very deep on anterior side.
A: pronates forearm.
Flexor retinaculum
Connective sheath tissue that covers the carpel tunnel.
Brachioradialis
A: flexes elbow
Extensor carpi radialis longus
A: extends wrist; radial deviation of hand
Extensor carpi radialis brevis
A: extends wrist; radial deviation of hand O: lateral epicondyle of humerus
Extensor digitorum
A: extends fingers O: lateral epicondyle of humerus
Extensor digiti minimi
A: extends little finger O: lateral epicondyle of humerus
Extensor carpi ulnaris
A: extends wrist; ulnar deviation of hand O: lateral epicondyle of humerus
Aconeus
A:
Supinator
A: Supinates forearm
Abductor pollicis longus
A: abducts thumb
Extensor pollicis brevis
A: extends thumb
Extensor pollicis longus
A: extends thumb
Extensor indicis
A: extends index finger
Extensor retinaculum
Connective tissue sheath that contains extensor tendons
Thenar group
Group of four muscles. Move thumb
Abductor digiti minimi
Muscle on pinky side. A: abducts little finger.
