Muscle Actions Flashcards
which muscles flex the shoulder?
deltoid (anterior fibers)
biceps brachii
pectoralis major (upper fibers)
which muscles extend the shoulder?
teres major
deltoid (posterior fibers)
latissimus dorsi
triceps brachii (long head)
pectoralis major (lower fibers)
which muscles abduct the shoulder?
supraspinatusdeltoid (all fibers)
which muscles adduct the shoulder?
teres major
infraspinatus
teres minor
latissimus dorsi
triceps brachii (long head)
pectoralis major (all fibers)
which muscles horizontally abduct the shoulder?
deltoid (posterior fibers)
which muscles horizontally adduct the shoulder?
deltoid (anterior fibers)
pectoralis major (upper fibers)
which muscles medially rotate the shoulder?
teres major
subscapularis
deltoid (anterior fibers)
latissimus dorsi
pectoralis major (all fibers)
which muscles stabilize the head of the humerus in the glenoid cavity?
supraspinatus
infraspinatus
teres minor
subscapularis
which muscles laterally rotate the shoulder?
infraspinatus
teres minor
deltoid (posterior fibers)
which muscles flex the hip?
rectus femoris
TFL
anterior fibers of glute med
iliopsoas (with origin fixed)
sartorius
which muscles extend the hip?
biceps femoris (long head)
semimembranosus
semitendinosus
glute max (all fibers)
glute med (posterior fibers)
adductor magnus (posterior fibres)
which muscles abduct the hip?
TFL
glute max (all fibers)
glute med (all fibers)
sartorius
which muscles adduct the hip?
glute max (lower fibers)
adductor longus
adductor brevis
adductor magnus
gracilis
pectineus
which muscles medially rotate the hip?
TFL
glute med (anterior fibers)
adductor longus
adductor brevis
adductor magnus
gracilis
pectineus
which muscles laterally rotate the hip?
glute max (all fibers)
glute med (posterior fibers)
sartorius
which muscles flex the knee?
gastrocnmeius
semimembranosus
semitendinosus
biceps femoris
sartorius
gracilis
popliteus
plantaris (weak)
which muscles extend the knee?
rectus femoris
vastus group (lateralis, medialis, intermedius)
which muscles medially rotate the flexed knee?
semimembranosus
semitendinosus
sartorius
gracilis
popliteus
which muscles laterally rotate the flexed knee?
biceps femoris
which muscles plantarflex the ankle?
gastrocnemius
soleus
tibialis posterior
FDL (weak)
FHL (weak)
Plantaris (weak)
which muscles dorsiflex the ankle?
EDL
tibialis anterior
which muscles invert the foot?
tibialis anterior
tibialis posterior
FDL
which muscles evert the foot?
EDL
fibularis longus
fibularis brevis
which muscles extend 2nd to 5th toes?
EDL
which muscles flex 2nd to 5th toes?
FDL
which muscles flex the 1st toe?
FHL
which muscles flex the elbow?
biceps brachii
brachioradialis
which muscles extend the elbow?
triceps brachii (all heads)
which muscles pronate the forearm?
brachioradialis (assists when movement is resisted)
which muscles supinate the forearm?
biceps brachii
brachioradialis (assists when movement is resisted)
which muscles tilt the pelvis posteriorly?
semimembranosus
semitendinosus
biceps femoris (long head)
rectus abdominus
which muscles tilt the pelvis anteriorly?
quadtratus lumborum
iliospoas (with insertion fixed)
which muscles flex the vertebral column?
rectus abdominus
external obliques
internal obliques
Iliopsoas (with insertion fixed, flexes trunk toward the thigh - is this the same? I dont know)
which muscles extend the vertebral column?
erector spinae group
which muscles laterally flex the vertebral column?
quadratus lumborum (same side)
external obliques (same side)
internal obliques (same side)
which muscles rotate the vertebral column to same side?
internal obliques
which muscles rotate the vertebral column to opposite side?
external obliques
which muscles flex the neck?
SCM scalenes (anterior only)
longus colli
which muscles extend the neck?
levator scapulae
splenius capitus
Splenius cervicis
trapezius (upper fibers)
RCP Major
RCP Minor
OCS
which muscles laterally flex the neck to the same side?
SCM
scalenes (all 3)
levator scapulae
splenius capitus
Splenius cervicis
trapezius (upper fibers)
longus colli
OCS
which muscles rotate the neck to same side?
levator scapulae
splenius capitus
Splenius cervicis
longus colli
RCP Major
OCI
which muscles rotate the neck to opposite side?
SCM
scalenes (all 3)
trapezius (upper fibers)
which muscles fix the last rib during forced inhalation and exhalation?
quadratus lumborum
which muscles draw ribs inferiorly/superiorly?
internal intercostals = inferiorly
external intercostals = superiorly
which muscles compress abdominal contents?
external obliques
internal obliques
which muscle draws down the central tendon and increases the volume of the thoracic cavity?
diaphragm
which muscles elevate the ribs during inhalation?
scalenes (all 3)
which muscles elevate the scapula?
levator scapulae
trapezius (upper fibers)
rhomboids
which muscles depress the scapula?
trapezius (lower fibers)
pectoralis minor
which muscles downwardly rotate the scapula?
levator scapulae
rhomboids
pectoralis minor
which muscles upwardly rotate the scapula?
trapezius (upper & lower fibers)
which muscles stabilize the scapula?
trapezius (middle fibers)
which muscles laterally flex the neck to the same side?
SCM
scalenes (all 3)
levator scapulae
splenius capitus
trapezius (upper fibers)
which muscles adduct/retract the scapula?
trapezius (middle fibers)
rhomboids
which muscles abduct/protract the scapula?
pectoralis minor
which muscles laterally tilt/elevate the pelvis?
quadratus lumborum
