Download MUSCLE ORIGIN INSERTION ACTION NERVE Pectoralis Major

MUSCLE
Pectoralis Major
ORIGIN
INSERTION
ACTION
NERVE
medial half of
clavicle;
Sternum;
upper six
costal
cartilages
Lateral lip of
intertubercular
horizontal adduction
groove of
humerus
Medial and lateral
pectoral nerves
External
surfaces of
ribs 3-5
Coracoid
process of the
scapula
Raises ribs in forced
inspiration; draws
scapula forward and
downward
Medial and lateral
pectoral nerves
Lateral third
of clavicle;
acromion and
crest of spine
of scapula;
Inner/medial
aspect of the
spine of the
scapula
Shrugging the
shoulders
Accessory
(eleventh cranial)
Pectoralis Minor
Trapezius
Latissimus Dorsi
Levator
Scapulae
External
occipital
protuberance;
ligamentum
nuchae;
Spinous
processes and
surpraspinous
ligaments of
C7 and all
thoracic
vertebrae
Spinous
processes of
lower six
thoracic
vertebrae;
Lumbar
vertebrae,
sacral
vertebrae,
supraspinous
ligament;
Posterior part
of iliac crest;
lower three or
four ribs;
Inferior angle
of the scapula
Posterior
tubercles of
transverse
processes of
C1-C4
Extends and hyperextends the arm,
drawing shoulder
Bottom of
intertubercular downward and
backward; Extends,
groove
adducts and medially
rotates the arm
Thoracodorsal
(C6-C8)
Superior angle
of scapula
Dorsal scapular
Elevates scapula
(synergist)
Rhomboid
Major
Rhomboid
Minor
Spines of
thoracic
vertebrae 2-5;
Supraspinous
ligament
Medial border
of the scapula
below the
spine
Retracts and stabilizes
scapula
Dorsal scapular
Spines of c7
and T1;
Lower part of
ligamentum
nuchae
Medial border
of the scapula
at the root of
spine
Retracts and stablizes
scapula
Dorsal scapular
Outer surface
of first 8-9
ribs
Anterior
surface of
medial border
of scapula
Holds scapula in place
against posterior
thoracic wall
Long Thoracic
Anterior
border and
superior
surface of
lateral third
of clavicle;
Lateral
border of the
acromion
process;
Lower border
of the crest of
the spine of
the scapular
Deltoid
tuberosity
Main action: abducts
arm; synergist: flexes
and medially rotates
arm, Extends and
laterally rotates arm
Axillary (C5, C6)
Supraspinous
fossa of
scapula
Superior facet
of greater
tubercle of
humerus
Hyperextension of the
arm
Suprascapular
nerve
Serratus
Anterior
Deltoid
ROTATOR
CUFF (SITS)
Supraspinatus
(rotator cuff)
Infraspinatus
(rotator cuff)
Infraspinous
fossa of
scapula
Middle facet
of the greater
tubercle of
humerus
Lateral rotation of the
arm, synergist to
abduction of arm
Suprascapular
nerve (C5, C6)
Upper 2/3 of
the posterior
surface of the
lateral border
of the scapula
Lower facet of
the grater
tubercle of
humerus
Laterally rotates arm
(synergist); weak
synergist to adduction
of arm
Axillary
Subscapular
fossa on the
anterior
surface of
scapula
Lesser
tubercle of
humerus
Internal rotation of the
arm
Upper and lower
subscapular
nerves (C5, C6)
Lower third
of the
posterior
surface of the
lateral border
of the
scapular, near
inferior angle
Syngergist to
Medial lip of
latissimus dorsi:
intertubercular Adducts arm, extends
arm, medially rotates
groove
arm
Teres Minor
(rotator cuff)
Subscapularis
(rotator cuff)
Teres Major
Lower
subscapular nerve
Brachialis
Anterior of
lower half of
humerus
Coronoid
process of
ulna; ulna
tuberosity
Primary forearm flexor
Musculocutaneous
Two heads:
Supraglenoid
tubercle of
scapulus &
coracoid
process of
scapula
Radial
tuberosity;
bicipital
aponeurosis
into deep
fascia on
medial side of
forearm
Supinates forearm in
flexion; weak forearm
flexor
Musculocutaneous
Tip of
coracoid
process of
scapula
Middle third
of the medial
surface of
border of
humerus
Flexor of humerus at
shoulder joing
Musculocutaneous
Long head:
infraglenoid
tubercle of
scapula;
Lateral head:
upper half of
posterior
surface of
humerus;
Medial head:
posterior
surface of
lower half of
humerus
(buried)
Posterior part
of olecranon
process of
ulna
Extends forearm; long
head aids in addution if
arm is abducted
Radial nerve
Biceps Brachii
Coracobrachialis
Triceps Brachii
Superficial
GROUP
Pronator Teres
(superficial
group)
Flexor carpi
radialus
(superficial
group)
Humeral
head- medial
supracondylar
ridge and
medial
epicondyle of
humerus;
Ulnar headmedial border
of the
coronoid
prrocess of
ulna
Middle of
lateral surface
of the radius
(pronator
tuberosity)
Pronates and flexes
forearm
Median nerve
Medial
epicondyle of
the humerus
through
common
tendon
(flexor
pronator
tendon)
Front of the
bases of the
second and
third
metacarpal
bones
Flexes hand; radial
deviation
Median nerve
Medial
epicondyle of
the humerus
through
common
tendon
(flexor
pronator
tendon)
Front of
flexor
retinaculum
and apex of
palmar
aponeurosis
Flexes the hand; makes
a tight fist
Median nerve
Humeral
head- medial
epicondyle of
humerus;
Ulnar headmedial
margin of
olecranon
process of
ulna, dorsal
border of
shaft of ulna
Pisiform
bone; hook of
hamate; base
of fifth
metacarpal
Flexes hand; ulnar
deviation
Ulnar nerve
Palmaris Longus
(superficial
group)
Flexor carpi
ulnaris
(superficial
group)
Flexor
Digitorum
Superficialis
(Intermediate
grp)
Flexor
Digitorum
Profundus
(deep)
Medial
epicondyle of
humerus
through
common
tendon;
medial
margin of
coronoid
process of
ulna; anterior
shaft of
radius
Four tendons
split and
connect at
middle
phalanges of
four fingers
Upper
anterior &
medial shaft
of ulna and
medial
coronoid
process,
interosseous
membrane
Front of base
of distal
phalanges of
fingers 2-5
Middle of
anterior
surface of
shaft of
radius,
interosseous
membrane,
Palmar aspect
of base of
distal phalanx
of thumb
Primary: flexion of
digits. Flexes carpal
region, MCPs & PCPs
of digits 2-5.
Median nerve
Flexes distal phalanges
(DIPS). Synergist to
MCPs & PIPs
Anerior
Interosseus/Ulnar
(digit flexion
backup for median
nerve)
Flexes the thumb
Anterior
interosseous
(branch of
median)
Flexor Pollicis
Longus
Three muscles in
Anterior
compartment of
forearm but no
action on digits:
Pronator
Quadratus
Anterior
surface of
distal part of
shaft of ulna
Lower portion
of anterior
surface of
shaft of
radius, distal
part of lateral
border of
radius
Pronates forearm and
hand; works with
Pronator teres for full
pronation.
Anterior
interosseous
(branch of
median)
Lateral
epicondyle of
humerus;
supinator
crest and foss
of ulna
Posterior and
lateral
surfaces of
upper third of
radius
suppinates forearm;
antagonist of pronator
teres and pronator
quadratus; supinator
when in extension,
syngergist in flexion
Radial nerve
(because origin
off lateral
condyle)
Upper 2/3 of
lateral
supracondylar
ridge of
humerus
Base of
styloid
process and
lateral surface
of radius
Radial nerve
Flexes forearm
(elbow flexion
(synergist to brachialis)
backup)
Supinator
Brachioradialis
Posterior
Compartment of
forearm
Extensor Carpi
Radialis (Brevis3
& Longus2)
Lateral
supracondylar Dorsal surface
of 2nd and 3rd
ridge and
epicondyle of metacarpals
humerus
extends hand; synergist
in radial deviation with
flexor carpi radialis;
antagonist to FCR for
extension/flexion
Radial
Extensor Carpi
Ulnaris
Extensor
Digitorum
Communis
Common
tendon
attached to
lateral
epicondyle of
humerus
Dorsal surface
of base of 5th
metacarpal
bone
Extends hand;
synergist in ulnar
deviation with flexor
carpi ulnaris
Radial nerve
(because origin
off lateral
condyle)
Common
tendon
attached to
lateral
epicondyle of
humerus
Lateral and
dorsal
surfaces of all
phalanges of
four fingers
Extends the fingers and
wrist; extension
expansion joint at
distal phalanges
Radial nerve
(because origin
off lateral
condyle)
Posterior
surface of
ulna and
adjacent part
of
interosseous
membrane
Extensor
expansion on
dorsal surface
of proximal
phalanx of
index finger
Extends index finger
Radial
Common
tendon
attached to
lateral
epicondyle of
humerus
Dorsal surface
of base of first
phalanx of
fifth finger
Extends fifth finger
(pulls out of
opposition)
Radial nerve
Extensor Indicis
Extensor Digiti
Minimi
Abductor
Pollicis Longus
Dorsal
surface of
shaft or
radius, ulna,
interosseous
membrane
Dorsal surface
of base of first
metacarpal
bone
Abducts thumb & wrist
Radial
Dorsal
surface of
radius,
adjacent part
of
interosseous
membrane
Base of
proximal
phalanx of
thumb
Extends thumb
Radial
Base of distal
phalanx of
thumb
Extends thumb
Radial
lateral aspect
of base of
proximal
phalanx of
thumb
Abducts thumb (with
Abductor Pollicis
Longus) and opposes
thumb to other fingers
Median
Medial and
lateral aspect
of base of
proximal
phalanx of
thumb
Flexes MCP joint of
thumb, opposes thumb
Median/Ulnar
Rotates thumb into
opposition, primary
thumb opposer;
separates us from
animals
Median
adducts thumb
Ulnar!
Extensor Pollicis
Brevis
Extensor Pollicis
Longus
Abductor
pollicis Brevis
(thenar
eminence)
Flexor Pollicis
Brevis (thenar
eminence)
Opponens
Pollicis (thenar
eminence)
Adductor
Middle third
of dorsal
surface of
ulna,
interosseous
membrane
Tubercle of
scaphoid,
tubercle of
trapezium,
flexor
retinaculum
Flexor
retinaculum
and
trapezium,
first
metacarpal
bone
Flexor
retinaculum,
tubercle of
trapezium
Anterior
Lateral border
of first
metacarpal
bone, wraps
around entire
lateral border
Medial side of
Pollicis
Abductor Digiti
Minimi
(Hypothenar
eminence)
Flexor Digiti
Minimi
(Hypothenar
eminence)
Opponens Digiti
Minimi
(Hypothenar
eminence)
Lumbricales
Palmar
Interossei (PAD)
Dorsal Interossei
(DAB)
surface of 2
&3
metacarpals,
capitate,
trapezoid
Pisiform
bone, tendon
of flexor
carpi ulnaris
Anterior
surface of
flexor
retinaculum,
hook of
hamate
Flexor
retinaculum,
hook of
hamate
JUST
KNOW:
Synergist to
PIP & MCP
function
Palmer
surface of
metacarpals:
ADducts
digits
between 2-3,
3-4, 4-5;
Dorsal
surface
between
metacarpals;
ABducts
between 2-3
and 3-4 digits
proximal
phalanx of
thumb
Medial side of
proximal
phalanx of
fifth finger
Abducts fifth finger
Medial side of
base of
proximal
phalanx of
fifth finger
Flexes fifth finger
(extrinisic muscles,
Flexor Digitorum
Ulnar
Profundus/Superficialis
are stronger flexers)
Whole length
of medial
border of fifth
metacarpal
bone
rotates fifth metacarpal
bone, flexing fifth
finger
Ulnar
Ulnar