KAAP Lab Unit 3 Upper Extremities Muscles (Innervation, Action,Insertion & Origin )

Muscle

Insertion / Origin / Action / Innervation

Deltoid m. (Insertion)

Insertion: Deltoid tuberosity of humerus

Deltoid m. (Origin)

Origin: Lateral third of clavicle, acromion, and spine of scapula

Deltoid m. (Action)

Action: Abduction, flexion, extension, and rotation of shoulder

Deltoid m. (Innervation)

Innervation: Axillary nerve (C5-C6)

Supraspinatus m. (Insertion)

Insertion: Greater tubercle of humerus

Supraspinatus m. (Origin)

Origin: Supraspinous fossa of scapula

Supraspinatus m. (Action)

Action: Initiates abduction of arm

Supraspinatus m. (Innervation)

Innervation: Suprascapular nerve (C5-C6)

Infraspinatus m. (Insertion)

Insertion: Greater tubercle of humerus

Infraspinatus m. (Origin)

Origin: Infraspinous fossa of scapula

Infraspinatus m. (Action)

Action: External (lateral) rotation of arm

Infraspinatus m. (Innervation)

Innervation: Suprascapular nerve (C5-C6)

Teres minor m. (Insertion)

Insertion: Greater tubercle of humerus

Teres minor m. (Origin)

Origin: Lateral border of scapula

Teres minor m. (Action)

Action: External (lateral) rotation of arm

Teres minor m. (Innervation)

Innervation: Axillary nerve (C5-C6)

Teres major m. (Insertion)

Insertion: Medial lip of intertubercular groove of humerus

Teres major m. (Origin)

Origin: Inferior angle of scapula

Teres major m. (Action)

Action: Medial rotation and adduction of arm

Teres major m. (Innervation)

Innervation: Lower subscapular nerve (C5-C7)

Subscapularis m. (Insertion)

Insertion: Lesser tubercle of humerus

Subscapularis m. (Origin)

Origin: Subscapular fossa of scapula

Subscapularis m. (Action)

Action: Internal (medial) rotation of arm

Subscapularis m. (Innervation)

Innervation: Upper and lower subscapular nerves (C5-C7)

Latissimus dorsi m. (Insertion)

Insertion: Intertubercular groove of humerus

Latissimus dorsi m. (Origin)

Origin: Spinous processes of T7-L5, thoracolumbar fascia, iliac crest

Latissimus dorsi m. (Action)

Action: Extension, adduction, and medial rotation of arm

Latissimus dorsi m. (Innervation)

Innervation: Thoracodorsal nerve (C6-C8)

Pectoralis major m. (Insertion)

Insertion: Lateral lip of intertubercular groove of humerus

Pectoralis major m. (Origin)

Origin: Clavicle, sternum, and costal cartilages

Pectoralis major m. (Action)

Action: Flexes, adducts, and medially rotates arm

Pectoralis major m. (Innervation)

Innervation: Medial and lateral pectoral nerves (C5-T1)

Muscle

Insertion / Origin / Action / Innervation

Pectoralis minor m. (Insertion)

Insertion: Coracoid process of scapula

Pectoralis minor m. (Origin)

Origin: Ribs 3-5

Pectoralis minor m. (Action)

Action: Stabilizes scapula, draws it inferiorly and anteriorly

Pectoralis minor m. (Innervation)

Innervation: Medial pectoral nerve (C8-T1)

Coracobrachialis m. (Insertion)

Insertion: Medial surface of humerus

Coracobrachialis m. (Origin)

Origin: Coracoid process of scapula

Coracobrachialis m. (Action)

Action: Flexion and adduction of arm

Coracobrachialis m. (Innervation)

Innervation: Musculocutaneous nerve (C5-C7)

Biceps brachii m. (Long head) (Insertion)

Insertion: Radial tuberosity and bicipital aponeurosis

Biceps brachii m. (Long head) (Origin)

Origin: Supraglenoid tubercle of scapula

Biceps brachii m. (Long head) (Action)

Action: Flexes elbow, supinates forearm

Biceps brachii m. (Long head) (Innervation)

Innervation: Musculocutaneous nerve (C5-C7)

Biceps brachii m. (Short head) (Insertion)

Insertion: Radial tuberosity and bicipital aponeurosis

Biceps brachii m. (Short head) (Origin)

Origin: Coracoid process of scapula

Biceps brachii m. (Short head) (Action)

Action: Flexes elbow, supinates forearm

Biceps brachii m. (Short head) (Innervation)

Innervation: Musculocutaneous nerve (C5-C7)

Brachialis m. (Insertion)

Insertion: Coronoid process and ulnar tuberosity

Brachialis m. (Origin)

Origin: Distal half of anterior humerus

Brachialis m. (Action)

Action: Primary flexor of forearm

Brachialis m. (Innervation)

Innervation: Musculocutaneous nerve (C5-C6), radial nerve (C7)

Triceps brachii m. (Long head) (Insertion)

Insertion: Olecranon of ulna

Triceps brachii m. (Long head) (Origin)

Origin: Infraglenoid tubercle of scapula

Triceps brachii m. (Long head) (Action)

Action: Extension of forearm and arm

Triceps brachii m. (Long head) (Innervation)

Innervation: Radial nerve (C6-C8)

Triceps brachii m. (Lateral head) (Insertion)

Insertion: Olecranon of ulna

Triceps brachii m. (Lateral head) (Origin)

Origin: Posterior surface of humerus, superior to radial groove

Triceps brachii m. (Lateral head) (Action)

Action: Extension of forearm

Triceps brachii m. (Lateral head) (Innervation)

Innervation: Radial nerve (C6-C8)

Triceps brachii m. (Medial head) (Insertion)

Insertion: Olecranon of ulna

Triceps brachii m. (Medial head) (Origin)

Origin: Posterior surface of humerus, inferior to radial groove

Triceps brachii m. (Medial head) (Action)

Action: Extension of forearm

Triceps brachii m. (Medial head) (Innervation)

Innervation: Radial nerve (C6-C8)

Anconeus m. (Insertion)

Insertion: Lateral surface of olecranon and posterior ulna

Anconeus m. (Origin)

Origin: Lateral epicondyle of humerus

Anconeus m. (Action)

Action: Assists in forearm extension and stabilizes elbow joint

Anconeus m. (Innervation)

Innervation: Radial nerve (C7-C8)

Pronator teres m. (Insertion)

Insertion: Lateral surface of radius

Pronator teres m. (Origin)

Origin: Medial epicondyle of humerus and coronoid process of ulna

Pronator teres m. (Action)

Action: Pronates forearm, flexes elbow

Pronator teres m. (Innervation)

Innervation: Median nerve (C6-C7)

Flexor carpi radialis m. (Insertion)

Insertion: Base of 2nd and 3rd metacarpals

Flexor carpi radialis m. (Origin)

Origin: Medial epicondyle of humerus

Flexor carpi radialis m. (Action)

Action: Flexes and abducts hand at wrist

Flexor carpi radialis m. (Innervation)

Innervation: Median nerve (C6-C7)

Palmaris longus m. (Insertion)

Insertion: Flexor retinaculum and palmar aponeurosis

Palmaris longus m. (Origin)

Origin: Medial epicondyle of humerus

Palmaris longus m. (Action)

Action: Flexes hand at wrist and tenses palmar aponeurosis

Palmaris longus m. (Innervation)

Innervation: Median nerve (C7-C8)

Flexor carpi ulnaris m. (Insertion)

Insertion: Pisiform, hook of hamate, base of 5th metacarpal

Flexor carpi ulnaris m. (Origin)

Origin: Medial epicondyle of humerus, olecranon and ulna

Flexor carpi ulnaris m. (Action)

Action: Flexes and adducts hand at wrist

Flexor carpi ulnaris m. (Innervation)

Innervation: Ulnar nerve (C7-C8)

Flexor digitorum superficialis m. (Insertion)

Insertion: Middle phalanges of medial four digits

Flexor digitorum superficialis m. (Origin)

Origin: Medial epicondyle of humerus and radius

Flexor digitorum superficialis m. (Action)

Action: Flexes PIP joints of fingers

Flexor digitorum superficialis m. (Innervation)

Innervation: Median nerve (C7-T1)

Flexor digitorum profundus m. (Insertion)

Insertion: Distal phalanges of medial four digits

Flexor digitorum profundus m. (Origin)

Origin: Proximal ulna and interosseous membrane

Flexor digitorum profundus m. (Action)

Action: Flexes DIP joints of fingers

Flexor digitorum profundus m. (Innervation)

Innervation: Median nerve (lateral half), ulnar nerve (medial half)

Flexor pollicis longus m. (Insertion)

Insertion: Distal phalanx of thumb

Flexor pollicis longus m. (Origin)

Origin: Anterior surface of radius and interosseous membrane

Flexor pollicis longus m. (Action)

Action: Flexes thumb at IP joint

Flexor pollicis longus m. (Innervation)

Innervation: Anterior interosseous nerve (C8-T1)

Ligament

Function / Location

Glenohumeral ll. (Function)

Function: Stabilizes shoulder joint

Glenohumeral ll. (Location)

Location: Surrounds the shoulder joint, connecting humerus and scapula

Glenoid labrum (Function)

Function: Deepens the glenoid cavity to stabilize the shoulder joint

Glenoid labrum (Location)

Location: Fibrocartilage rim around the glenoid cavity of scapula

Acromioclavicular l. (Function)

Function: Stabilizes acromioclavicular joint

Acromioclavicular l. (Location)

Location: Between acromion and clavicle

Coracoclavicular l. (Function)

Function: Stabilizes the clavicle to the scapula

Coracoclavicular l. (Location)

Location: Extends from coracoid process to clavicle

Radial collateral l. (Function)

Function: Provides lateral stability to elbow

Radial collateral l. (Location)

Location: Connects lateral epicondyle of humerus to radius

Ulnar collateral l. (Function)

Function: Provides medial stability to elbow

Ulnar collateral l. (Location)

Location: Connects medial epicondyle of humerus to ulna

Anular l. (Function)

Function: Stabilizes proximal radius during pronation/supination

Anular l. (Location)

Location: Encircles the head of the radius, holding it against the ulna