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Anatomy of the UE

TermDefinition
Intrinsic Muscles innervated by Median Nerve (3) Abductor pollicis Brevis, opponens pollicis, flexor pollicis brevis
Abductor Pollicis Brevis Insertion, Base of proximal phalanx, radial side of thumb Function: Palmar abduction Innervated by Median N
Oppenens pollicis Insertion: 1st metacarpal Function: opposition Innervated by Median N
Flexor pollicis Brevis: superficial head Insertion: base of proximal phalanx, radial side of thumb Function: MCP flexion Innervated by Median N
Intrinsic muscles innervated by the ulnar nerve (7) Abductor digiti minimi, Flexor digiti minimi, adductor, lumbricles (ulnar side), palmar interossei, dorsal interossei
Abductor digiti minimi Insert: proximal phalanx of 5th digit Function: Abduction of the 5th digit Innervated by Ulnar N
Opponens digiti minimi Inset: 5th metacarpal Function: opposition of the 5th digit Innervated by Ulnar N
Flexor digiti minimi Insert: proximal phalenx of 5th digit Function: Flexion of MCP joint and opposition of the 5th digit Innervated by Ulnar N
Adductor Insert: base of proximal phalanx Function: adducts CMC joint of thumb Innervated by Ulnar N
Lumbricals (ulnar side) Insert: Radial side of digits 4 and 5 into extensor expansion Function: MCP flexion and extension of IP joints of digits 4 and 5 Innervated by Ulnar N
Palmar interossei Insert: ulnar surface of 2nd MCP radial surface of 4th/5th MCP Function: Adduction and assist with MCP flexion/extension of IP joints 2-5 Innervated by Ulnar N
Extrinsic flexor muscles of the hand innervated by the Median Nerve (3) (flexors of the digits) Flexor digitorum superficialis (FDS), Flexor digitorum profundis (FDP), Flexor pollicis longus (FPL)
Flexor digitorum superficialis (FDS) Origin: medial epicondyle inset: middle phalenx function: flexion of PIP Innervated by Median N
Flexor digitorum profundis (FDP) Median N origin: procimal 2/3 of the ulna and interrosseous membrane Insert: distal phalenx Function: Flexion of DIP joints 2 and 3 Innervated by Median N
Flexor pollicis longus (FPL) Origin: radius, middle 1/3 insertion: distal phalenx of the thumb Function: Flexion of the IP joint of the thumb Innervated by Median N
Extrinsic flexors of the hand innervated by the Ulnar Nerve (1) Flexor digitorum profundus
Flexor digitorum profundus (ulnar N) origin: proximal 2/3 of the ulna and interrosseous membrane Insert: distal phalenx Function: Flexion of DIP joints 4 and 5 Innervated by the Ulnar Nerve
Extrinsic extensor muscles of the hand innnervated by the radial N (6) Extensor digitorum communis (EDC), Extensor Digiti minimi (EDM), Extensor indicis proprius (EIP), Extensor Pollicis longus (EPL), Extensor Pollicis Brevis (EPB), Abductor pollicis longus (APL)
Extensor digitorum communis (EDC) Origin: lateral epicondyle Inset: Medial band to middle phalanx and lateral band to distal phalenx Function: Extension of MCP joints and contribution to extension of IP joints Innervated by the Radial Nerve
Extensor Digiti minimi (EDM) Origin: lateral epicondyle Insert: Onto EDC at MCP level of the 5th digit Function: extension of MCP joint of the 5th digit and contributes to extension of the IP joints Innervated by the Radial Nerve
Extensor indicis proprius (EIP) Origin: Middle 1/3 ulna Insert: Into EDM aat MCP level Function: extension of MCP joint at 2nd digit and contributes to extension of IP joints Innervated by the Radial Nerve
Extensor Pollicis longus (EPL) Origin: ulna, middle 1/3 Insert: distal phalenx of the thumb Function: Extension of the IP joint of the thumb Innervated by the Radial Nerve
Extensor Pollicis Brevis (EPB) Origin: radius middle 1/3 Insert: proximal phalenx of thumb Function: extension of MCP and CMC joints of the thumb Innervated by the Radial Nerve
Abductor pollicis longus (APL) Origin: middle 1/3 of ulna and radius Insert: 1st metacarpal, radial side Function: abduction and extension of CMC joint Innervated by the Radial Nerve
Wrist Flexors innervated by the Median N (2) Flexor carpi radialis (FCR) and Palmaris Longus (PL)
Flexor carpi radialis (FCR) Origin: Medial Epicondyle Insert: 2nd and 3rd metacarpal bone Function: flexion of wrist and radial deviation Innervated by the Median N
Palmaris Longus (PL) Origin: medial epicondyle Insert: palmar aponeurosis Function: Flexion of the wrist Innervated by the Median N
Wrist Flexors innervated by the ulnar nerve (1) Flexor carpi ulnaris
Flexor Carpi Ulnaris (FCU) Origin: Medical epicondyle & proximal 2/3 of the ulna Insert: pisiform and 5th metacarpal Function: flexion of the wrist and ulnar deviation
Wrist Extensors innervated By the radial N (3) Extensor Carpi radialis brevis (ECRB), Extensor Carpi radialis longus (ECRL), Extensor carpi ulnaris (ECU)
Extensor Carpi radialis brevis (ECRB) Origin: Lateral epiconydle Insert: 3rd metacarpal base Function: Extension of wrist and radial deviation Innervated by the Radial N
Extensor Carpi radialis longus (ECRL) Origin: Supracondylar ridge of the humerous Insert: 2nd metacarpal base Function: extension of wrist and radial deviation Innervated by the Radial N
Extensor carpi ulnaris (ECU) Origin: lateral epicondyle Insert: 5th metacarpal Function: extension of wrist and ulnar deviation Innervated by the Radial N
Volar forearm muscles Innervated by the Median N (2) Pronator teres, Pronator quadratus
Pronator teres Origin: Medial epicondyle and coronoid process of ulna Insert: lateral surface of the radius Function: forearm pronation Innervated by the Median N
Pronator quadratus Origin: distal ulna Insert: distal radius Function: forarm pronation nnervated by the Median N
Dorsal forearm muscles innervated by the Radial N (1) Supinator
Supinator Origin: lateral epicondyle and ulna Insert: radius Function: Supination Innervated by the Radial N
Elbow flexion muscles innervated by the musculocuteneous N (2) Biceps, brachialis
Biceps Origin: coracoid process and supraglenoid tubercle (long and short head) Insert: radial tuberocity Function: Elbow flexion with forearm supinated Innervated by the musculocutaneous N
Brachialis Origin: distal 2/3 of the humerous Insert: Ulnar tuberocity Function: Elbow flexion with forearm pronated Innervated by the musculocutaneous N
Elbow flexion muscles innervated by the radial N (1) Brachioradialis
Brachioradialis Origin: Supracondylar ridge Insert: distal radius Function: elbow flexion with forearm neutral Innervated by Radial N
Elbow extension muscles innervated by the radial N (2) Triceps, Anconeus
Triceps Origin: Long head: infraglenoid tuberocity Lateral head: posterior humerous Insert: olecranon Function: Elbow extension Innervated by Radial N
Anconeus Origin: Lateral epicondyle and capsule of elbow joint Insert: olecranon and upper 1/4 of dorsal ulna Function: elbow extension
Rotator Cuff Muscles Subscapularis, suprascaularis, infraspinatos, Teres minor
Subscapularis Origin: Anterior surface of scapula Insert: Lesser tuberocity Function: IR Innervated by subscapular N
Supraspinatus Origin: supraspinatus fossa Insert: Greater tuberocity Function: Abduction and shoulder flexion Innervated by suprascapular N
Infraspinatous Origin: Infraspinatus fossa Insert: Greater tuberocity Function: ER Innervated by suprascapular N
Teres Minor Origin: Axillary boarder of scapula Insert: Greater tuberocity Function: ER Innervated by axillary N
Shoulder Flexion Muscles (3) Anterior deltoid, Coracobrachialis, supraspinatous
Anterior Deltoid Origin: clavicle Insert: deltoid tuberocity Function: Shoulder flexion Innervated by Axillary N
CoracoBrachialis Origin: Coracoid process Insert: Medial aspect of deltoid Function: shoulder flexion Innervated by musculocutaneous
Shoulder Abduction (2) Middle deltoid, supraspinatous
Middle Deltoid Origin: Acromion Insert: deltoid tuberocity Function: shoulder abduction Innervated by axillary N
Hozizontal Adduction Muscles (1) Pectoralis Major
Pectoralis Major Origin: Medical clavicle, sternum, and ribs 1-7 Insert: greater tuberocity Function: horizontal adduction Innervated by lateral pectoral N
Horizontal Abduction muscles (1) Posterior deltoid
Posterior deltoid Origin: spine of scapula Insert deltoid tuberocity Function: horizontal abduction Innervated by axillary N
Shoulder extension Muscles (3) Latissimus dorsi, Teres major, Posterior deltoid
Latissimus Dorsi Origin: T6-12, L1-5, sacral vertebrae, ribs 9-12, iliac crest, and inferior angle of scapula Insert: intertubercular groove of humerous Function: Shoulder extension Innervated by thoracodorsal nerve
Teres Major Origin: Inferior angle of scapula Insert: intertubercular groove of hummerous Function: SHoulder extension Innervated by Subscapular N
Upward rotation of scapula (2) Trapezius, Serratus anterior
Trapezius Origin: occiput>t12 Insert 1/3 claivcle, acromium, medial spine of scapula Function: Uppward rotation of scapula Innervated by Spinal accesory N (CNXI)
Serratus Anterior Origin: Ribs 1-8 and aponeurosis of intercostals Insert: Superior and inferior angles of scauplua and vertebral boarders of the scapua Function: Upward rotation of scapula Innervated by the long thoracic N
Dowanward rotation of the scapula (4) Levator scapulae, rhomboids, serratus anterior, latissimum dorsi
Levator scapulae Origin: c1-c4 transerve processes Insertion: vertebral boarder of scapula Function: downward rotation of muscles Innerveted by c3-c4 nerves
Rhmoboids Origin: c7-t5 spinous processes Insertion: vertebral boarder distal to the spine of scapula Function: downward rotation of scapula Innerve=ated by dorsal scapular N
Scapular adduction muscles 2 Middle trapezius, rhomboids major
Scapular Abduction muscles 1 serratus anterior
Scapular elevation 2 trapezius, levator scapulae
Scapular depression 1 trapezisus
Created by: kristenOT
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