Musculoskeletal Flash Cards Upper Limb Prepared by: Feng-Yen Li Supervised by: Kim Topp.
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Transcript of Musculoskeletal Flash Cards Upper Limb Prepared by: Feng-Yen Li Supervised by: Kim Topp.
Musculoskeletal Flash CardsUpper Limb
Prepared by: Feng-Yen LiSupervised by: Kim Topp
IntroductionUseful tips for usage:1. These flashcards are meant to help you learn the movements
of the muscles. They are most useful when you see how the movements makes sense in relation to the origin and insertion points.
2. For exam purposes, you only need to know (memorize) the action, innervation, and arterial supply of each muscle. But Italicized = do not need to know for exam.
3. The purple slides are summary slides (if applicable) of subsequent muscles. Use these to learn the common properties of groups of muscles.
4. Information about each muscle is also listed in the notes section under each picture slide.
5. The titles in table of contents are hyperlinked its slide, but you need to go into presentation mode to use the hyperlinks.
Acknowledgements
Special thanks go to: Kim Topp for reviewing all the slides for validity. Daniel Orjuela and Paul Teresi for taking the
cadaver pictures. UCSF 2006 Curriculum Ambassador Program
for funding this project. UCSF 2006 Curriculum Ambassadors and
Mentors for offering useful suggestions. Members of the UCSF Class of 2009 for inspiring
and supporting me to do this project.
Useful Websites
Here are other useful sites to learn the muscles:
http://www.rad.washington.edu/atlas/ (shows each muscle in isolation)
http://www.ithaca.edu/faculty/lahr/LE2000/LE_index.html
(has many nicely labeled cadaver pictures)
Table of Contents
Anterior ArmCoracobrachialisBiceps BrachiiBrachialis
Posterior ArmTriceps Brachii
Anterior ForearmSuperficial Muscles
Pronator TeresFlexor Carpi RadialisFlexor Carpi UlnarisFlexor Digitorum SuperficialisPalmaris Longis
Deep MusclesFlexor Digitorum ProfundusFlexor Pollicis LongusPronator Quadratus
Posterior Forearm Superficial Muscles
Extensor DigitorumExtensor Carpi UlnarisExtensor Carpi Radialis LongusExtensor Carpi Radialis BrevisBrachioradialis
Deep MusclesAbductor Pollicis LongusExtensor Pollicis LongusExtensor IndicisSupinator
The HandThenar EminenceHypothenar EminenceAdductor PollicisPalmar InterosseiDorsal Interossei
Anterior Arm• Action Flex the forearm at elbow joint (except
coracobrachialis)• Innervation Musculocutaneous nerve• Arterial Supply Muscular branches of brachial
artery
Coracobrachialis
Origin
Insertion
Coracobrachialis• Origin coracoid process • Insertion Humerus• Action flex and adduct arm • Innervation Musculocutaneous nerve (C5, C6
and C7) • Arterial Supply Muscular branches of brachial
artery
Biceps BrachiiOrigin
Insertion
Biceps Brachii• Origin
– Short head: tip of coracoid process of scapula– Long head: supraglenoid tubercle of scapula
• Insertion Radius• Action Supinates + flexes (when supine) forearm • Innervation Musculocutaneous nerve (C5 and C6 ) • Arterial Supply Muscular branches of brachial
artery
Brachialis
Origin
Insertion
Brachialis• Origin Humerus• Insertion Ulna• Action Major flexor of forearm • Innervation Musculocutaneous nerve (C5
and C6) • Arterial Supply Muscular branches of
brachial artery, recurrent radial artery
Posterior Arm• Action Extend the forearm at elbow joint• Innervation Radial nerve• Arterial Supply Branches of deep brachial artery
Triceps Brachii
Origin
Insertion
Triceps Brachii• Origin
– Long head: scapula– Medial + Lateral heads: posterior surface of
humerus• Insertion Olecranon process of ulna • Action Chief extensor of forearm• Innervation Radial nerve (C6, C7 and C8) • Arterial Supply Branches of deep brachial artery
Anterior Forearm• Action Pronate the forearm, flex the wrist, and flex
the digits• Innervation Median and ulnar nerves
Superficial Muscles
• Origin Medial epicondyle• Innervation Median nerves (except flexor carpi
ulnaris)• Artery Supply Ulna artery (except flexor carpi
radialis)
Pronator TeresOrigin
Insertion
Pronator Teres• Origin Mainly medial epicondyle of humerus• Insertion Radius• Action Pronates and flexes forearm • Innervation Median nerve (C6 and C7) • Arterial Supply Ulnar artery
Flexor Carpi Radialis
Origin
Insertion
Flexor Carpi Radialis• Origin Mainly medial epicondyle of humerus• Insertion 2nd metacarpal• Action Flexes the wrist• Innervation Median nerve (C6 and C7) • Arterial Supply Radial artery
Flexor Carpi Ulnaris
Origin
Insertion
Flexor Carpi Ulnaris• Origin Mainly medial epicondyle of humerus• Insertion Pisiform bone, hamate bone, + 5th
metacarpal • Action Flexes the wrist• Innervation Ulnar nerve (C6 and C7) • Arterial Supply Ulnar artery
Flexor Digitorum Superficialis
Origin
Insertion
Flexor Digitorum Superficialis• Origin Medial epicondyle, radius, ulna• Insertion middle phalanges of digits 2 – 5• Action Flexes digits 2-5 (not at distal
interphalangeal joint)• Innervation Median nerve (C7, C8 and T1) • Arterial Supply Ulnar artery
Palmaris Longus
Origin
Insertion
Palmaris Longus• Origin Medial epicondyle, radius, ulna• Insertion Distal half of flexor retinaculum and
palmar aponeurosis • Action Flexes wrist• Innervation Median nerve (C7, C8 and T1) • Arterial Supply Ulnar artery
Deep Muscles
• Origin Radius and Ulna• Innervation Mostly median nerve (C8 and T1) • Artery Supply Mostly anterior interosseous artery
Flexor Digitorum Profundus
Origin
Insertion
Flexor Digitorum Profundus• Origin Ulna• Insertion distal phalanx of digits 2 - 5 • Action Flexes phalanges 2-5 at distal
interphalangeal joint• Innervation
– Medial part: ulnar nerve (C8 and T1)– Lateral part: median nerve (C8 and T1)
• Arterial Supply Ulnar and anterior interosseous arteries
Flexor Pollicis Longus
Origin
Insertion
Flexor Pollicis Longus• Origin Radius• Insertion distal phalanx of thumb • Action Flexes thumb• Innervation Median nerve (C8 and T1) • Arterial Supply Anterior interosseous artery
Pronator Quadratus
OriginInsertion
Pronator Quadratus• Origin Ulna• Insertion Radius • Action Pronates forearm• Innervation Median nerve (C8 and T1) • Arterial Supply Anterior interosseous
artery
Posterior Forearm• Action Supinate the forearm, extend the wrist, and
extend the digits • Innervation Radial nerve
Superficial Muscles
• Origin Lateral epicondyle or humerus• Innervation Mostly radial nerve • Artery Supply Mostly Radial artery
Extensor Digitorum
Origin
Insertion
Extensor Digitorum• Origin Lateral epicondyle• Insertion Extensor expansions of digits 2-5 • Action Extends metacarpophalangeal joints +
wrist joint • Innervation Posterior interosseous nerve (C7
and C8), deep branch of the radial nerve • Arterial Supply Posterior interosseous arteries
Extensor Carpi Ulnaris
Origin
Insertion
Extensor Carpi Ulnaris• Origin Lateral epicondyle• Insertion 5th metacarpal • Action Extends and adducts wrist joint • Innervation Posterior interosseous nerve (C7 and
C8); deep branch of the radial nerve • Arterial Supply Ulnar artery
Extensor Carpi Radialis Longus
Origin
Insertion
• Origin Humerus• Insertion 2nd metacarpal • Action Extends hand at wrist joint • Innervation Radial nerve (C6 and C7) • Arterial Supply Radial artery
Extensor Carpi Radialis Longus
Extensor Carpi Radialis Brevis
Origin
Insertion
• Origin Lateral epicondyle• Insertion 3rd metacarpal • Action Extends hand at wrist joint • Innervation Deep branch of radial nerve
(C7 and C8) • Arterial Supply Radial artery
Extensor Carpi Radialis Brevis
Brachioradialis
Origin
Insertion
Brachioradialis• Origin Humerus• Insertion Radius • Action Flexes forearm • Innervation Radial nerve (C5, C6 and C7) • Arterial Supply Radial recurrent artery
Deep Muscles
• Origin Ulna and interosseous membrane between radius and ulna
• Innervation Mostly deep branch of radial nerve • Artery Supply (posterior) interosseous artery
Abductor Pollicis Longus
Origin
Insertion
Abductor Pollicis Longus
• Origin Ulna• Insertion 1st metacarpal • Action Abducts thumb • Innervation Posterior interosseous nerve (C7
and C8), deep branch of the radial nerve • Arterial Supply Posterior interosseous artery
Extensor Pollicis Longus
Origin
Insertion
Extensor Pollicis Longus• Origin Ulna• Insertion Distal phalanx of thumb • Action Extends thumb • Innervation Posterior interosseous nerve (C7
and C8), deep branch of the radial nerve • Arterial Supply Posterior interosseous artery
Extensor Indicis
OriginInsertion
Extensor Indicis• Origin Ulna• Insertion 2nd digit • Action Extends 2nd digit • Innervation Posterior interosseous nerve (C7
and C8), deep branch of the radial nerve • Arterial Supply Posterior interosseous artery
Supinator
Origin
Insertion
Supinator• Origin Lateral epicondyle, ulna• Insertion Radius• Action Supinates forearm• Innervation Deep branch of radial nerve
(C5, C6) • Arterial Supply Recurrent interosseous
artery
The Hand• Innervation Mostly ulnar nerve (except thenar
eminence)• Palmar Aponeurosis• Carpal Tunnel (Median nerve, Flexor digitorum
superficialis, Flexor digitorum profundus, Flexor pollicis longus; transverse carpal ligament)
• Osseofibrous tunnels • Extensor expansion
Thenar Eminence
Thenar Eminence• Muscles Abductor pollicis brevis, flexor pollicis
brevis, opponens pollicis• Action Abduct, flex, and oppose the thumb • Innervation Recurrent branches of median nerve
Hypothenar Eminence
Hypothenar Eminence• Muscles Abductor digiti minimi, flexor digiti minimi
brevis, opponens digiti minimi• Action Abduct, flex, and oppose the little finger • Innervation Ulnar nerve
Adductor Pollicis
OriginInsertion
Adductor Pollicis• Origin 3rd metacarpal• Insertion Proximal phalanx of thumb • Action Adducts thumb• Innervation Deep branch of ulnar nerve (C8
and T1) • Arterial Supply Deep palmar arterial arch
Palmar Interossei
Origin
Insertion
Palmar Interossei• Origin Palmar surfaces of 2nd, 4th and 5th
metacarpals• Insertion Proximal phalanges of digits 2, 4
and 5 • Action Adduct digits toward axial line along
3rd digit• Innervation Deep branch of ulnar nerve (C8
and T1) • Arterial Supply Palmar metacarpal arteries
Dorsal Interossei
Origin
Insertion
Dorsal Interossei• Origin Adjacent sides of two metacarpals • Insertion Proximal phalanges of digits 2, 3 and 4 • Action Abduct digits away from axial line along
3rd digit• Innervation Deep branch of ulnar nerve (C8 and
T1) • Arterial Supply Dorsal and palmar metacarpal
arteries