Muscles of the arm and hand lecture 8 Flashcards
Pronator Teres Orgin; humeral head
Medial epicondyle of the humerus above common flexor orgin (CFO)
Pronator Teres Ulnar head orgin
coronoid process of the ulna
Pronator Teres insertion
midlateral surface of shaft radius
Pronator Teres Nerve
median nerve
Pronator Teres action
pronate forearm and elbow flexion
Flexor Carpi Radialis (FCR) orgin
medial epicondyle of the humerus via the common flexor tendon
Flexor Carpi Radialis (FCR) insertion
Base of 2nd and 3rd meta carpals (palmar surface)
Flexor Carpi Radialis (FCR) nerve
median nerve
Flexor Carpi Radialis (FCR) movement
flex and radially deviate wrist
palmaris longus (PL) orgin
medial epicondyle of humerus via the common flexor tendon
palmaris longus (PL) insertion
palmar carpal ligament and palmar aponeurosis
palmaris longus (PL) nerve
median nerve
Flexor Carpi Ulnaris (FCU) humeral head origin
medial epicondyle via the common flexor tendon
Flexor Carpi Ulnaris (FCU) ulnar head origin
olecranon and posterior border of ulna (superior 2/3)
Flexor Carpi Ulnaris (FCU) insertion
pisiform, hook of hamate, base of 5th metacarpal
Flexor Carpi Ulnaris (FCU) nerve
ulnar nerve
Flexor Carpi Ulnaris movement
flexes and ulnar deviates wrist
palmaris longus (PL) movement
flexes wrist and tightens palmar aponeurosis (pincer grasp)
which muscle is unilaterally absent in 16% of the population and 9% bilaterally?
Palmaris longus
what muscle can play a factor in cubital tunnel syndrome?
Flexor Carpi Ulnaris
Flexor digitorum superficialis (FDS) origin humeral head
medial epicondyle of the humerus and coronoid process of the ulna
Flexor digitorum superficialis (FDS) origin radial head
oblique line of the radius (anterior surface)
Flexor digitorum superficialis (FDS) insertion
shaft of middle phalanges digits 2-5
Flexor digitorum superficialis (FDS) nerve
median nerve
Flexor digitorum superficialis (FDS) movement
flexion of MCP and PIP joints and wrist flexion
tendinous arch between 2 heads is where the median nerve and ulnar nerve pass to get to deep muscles what associated muscle?
Flexor digitorum superficialis (FDS)
Flexor digitorum profundus origins
( proximal 2/3 ) anterior surface of ulna and interosseous membrane
Flexor digitorum profundus does or does not have a radial origin
Flexor digitorum profundus does not have a radial origin
Flexor digitorum profundus insertion
bases of distal phalanges of digits 2-5
Flexor digitorum profundus shares a common tendonious sheath with what muscle?
Flexor digitorum superficialis
Flexor digitorum profundus _____ and ____ nerves for lateral part of muscle ______ nerve for medial part of muscle
median and ulnar, ulnar
Flexor digitorum profundus movement
DIP and wrist flexion
Flexor pollicis longus (FPL) orgin
anterior surface of radius, interosseous membrane
Flexor pollicis longus (FPL) insertion
base of distal phalanx of 1st digit
Flexor pollicis longus (FPL) nerve
median nerve
Flexor pollicis longus (FPL) action
flexion of the 1st digit
does Flexor pollicis longus (FPL) have an ulnar origin
no
Pronator quadratus (PQ) origin
distal 1/4 of the anterior surface of the ulna
Pronator quadratus insertion
distal 1/4 of the anterior surface of the radius
Pronator quadratus nerve
median nerve
Pronator quadratus action
forearm pronation
Brachioradialis (BR) origin
Lateral supracondylar
ridge of the humerus
Brachio Radialis (BR) insertion
Base of styloid process
of the radius
Brachio Radialis (BR) action
Flexes forearm at elbow
joint and rotates forearm
to the midprone position
Extensor Carpi Radialis
Longus (ECRL) origin
Distal 1/3 of the
lateral supracondylar
ridge of humerus
Extensor Carpi Radialis
Longus (ECRL) insertion
Base of 2nd
metacarpal
(dorsal surface)
Extensor Carpi Radialis
Longus (ECRL) action
Extends and radially
deviates the
wrist
Extensor Carpi Radialis Brevis (ECRB) origin
Lateral epiondyle of
humerus via common
extensor tendon
Extensor Carpi Radialis Brevis (ECRB) insertion
Base of 3rd
metacarpal
(dorsal and radial
surface)
Extensor Carpi Radialis Brevis (ECRB) action
Extends and radially
deviates the
wrist
stopped nerve cards at pronator quadratous
Extensor Digitorum (ED) origin
Lateral epicondyle of
humerus via common
extensor tendon
Extensor Digitorum (ED) insertion
Middle and distal
phalanges of the
medial 4 digits
Extensor Digitorum (ED) action
Extends medial 4 digits
at MCP and IP joints
and assists wrist
extension
Extensor Digiti Minimi (EDM) origin
Lateral epicondyle of
humerus via common
extensor tendon
Extensor Digiti Minimi (EDM) insertion
Tendon of extensor
digitorum on 5th
digit (extensor expansion
or hood)
Extensor Digiti Minimi (EDM) action
Extends 5th digit at MCP
and IP joints
Extensor Carpi Ulnaris (ECU) origin
Lateral epicondyle of
humerus via common
extensor tendon and
posterior border of
the ulna
Extensor Carpi Ulnaris (ECU) insertion
Base of 5th
metacarpal
(ulnar surface)
Extensor Carpi Ulnaris (ECU) action
Extends and ulnarly
deviates (adducts) the
wrist
Supinator origin
Lateral epiocondyle of
humerus, radial collateral
and annular ligaments,
and the supinator crest
of the ulna
Supinator insertion
Superior 1/3 of the
lateral and anterior
surface of the radius
Supinator action
Supinates forearm and
may assist in elbow flexion
Abductor Pollicis Longus (AbdPL) origin
Posterior surface of
middle of radius and
ulna and interosseus
membrane
Abductor Pollicis Longus insertion (AbdPL)
Base of 1st
metacarpal
(lateral/radial side)
Abductor Pollicis Longus action (AbdPL)
Abducts and extends
first digit (thumb) at
carpometacarpal joint
and abducts wrist
(push thumb into table)
Extensor Pollicis Longus (EPL) origin
Middle 1/3 of the
posterior surface of
the ulna and the
interosseus membrane
Extensor Pollicis Longus (EPL) insertion
Base of the distal
phalanx of the thumb
Extensor Pollicis Longus (EPL) action
Extends IP joint of first
digit (thumb) and assists
extension at the MCP
joint
Extensor Pollicis Brevis (EPB) origin
Posterior surface of
the middle of the
radius and
interosseus membrane
Extensor Pollicis Brevis (EPB) insertion
Base of proximal
phalanx of thumb
Extensor Pollicis Brevis (EPB) action
Extends MCP joint of the
first digit (thumb)
Extensor Indicis (EI) origin
Distal posterior
surface of the ulna and
interroseus membrane
Extensor Indicis (EI) insertion
Tendon of extensor
digitorum on the
2nd digit
(extensor expansion
or hood)
Extensor Indicis (EI) action
Extends 2nd digit at the
MCP and IP jts.
Abductor Pollicis Brevis origin
Flexor retinaculum,
scaphoid and tubercle
of the trapezium
Abductor Pollicis Brevis insertion
Base of proximal
phalanx of first digit
(lateral/radial aspect)
Abductor Pollicis Brevis action
Abducts first digit at CMC
joint
Opponens Pollicis origin
Flexor retinaculum
and trapezium
Opponens Pollicis insertion
Lateral shaft of first
metacarpal
(radial side)
Opponens Pollicis action
Opposition of the first digit
at the CMC joint
Flexor Pollicis Brevis origin
Flexor retinaculum and
trapezium
Flexor Pollicis Brevis insertion
Base of proximal
phalanx of first digit
(lateral/radial aspect)
Flexor Pollicis Brevis action
Flexes first digit at MCP
and CMC joints
Adductor Pollicis origin Oblique head:
Capiate and bases of
metacarpals 2 and 3
Adductor Pollicis insertion
Medial side of
proximal phalanx of
thumb (migraine trigger point)
Adductor Pollicis action
Adducts first digit and
assists with flexion at
MCP and CMC joint
Adductor Pollicis origin Transverse head:
3rd metacarpal - anterior
surface (palmar)
Palmaris Brevis origin
Flexor retinaculum
and palmar aponeurosis
Palmaris Brevis insertion
Skin on ulnar border
of palm of hand
Palmaris Brevis action
Draws skin toward
middle of palm
(Italian gesture)
Abductor Digiti Minimi origin
Pisiform
Abductor Digiti Minimi insertion
Base of proximal
phalanx of 5th digit
Abductor Digiti Minimi action
Abducts 5th digit
at MCP joint
Flexor Digiti Minimi Brevis origin
Flexor retinaculum
and hook of hamate
Flexor Digiti Minimi Brevis insertion
Base of proximal
phalanx of 5th digit
Flexor Digiti Minimi Brevis action
Flexes 5th digit at the
MCP joint
Opponens Digiti Minimi origin
Flexor retinaculum
and hook of the hamate
Opponens Digiti Minimi insertion
Medial border of
shaft of 5th metacarpal
Opponens Digiti Minimi action
Opposition of 5th digit
at CMC joint
Lumbricales origin
Tendons of flexor
digitorum profundus
(off lateral aspect of
2nd-5th tendons and
off medial aspect of 3rd
& 4th tendons also)
Lumbricales insertion
Extensor expansions
(hoods) of digits 2 - 5
Lumbricales action
Flexes at MCP joints and
extends at IP joints
Dorsal Interosseii origin
Adjacent sides of the
shaft of the metacarpals
(2 heads)
Dorsal Interosseii insertion
Extensor expansions
and bases of proximal
phalanges of digits
2, 3, 4
Dorsal Interosseii action
Abduct digits, flexes at
MCP joints and
extends at IP joints
Palmar Interosseii origin
Palmar medial surface of
2nd metacarpal and
palmar lateral surface
of 4th & 5th metacarpal
(1 head)
Palmar Interosseii insertion
Extensor expansions
and bases of proximal
phalanges of digits
2, 4, and 5
Palmar Interosseii action
Adduct digits and
flexes MCP joints and
extends at IP joints