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PTA 1020 final exam
Muscles for final
38
Anatomy
Undergraduate 2
04/24/2018

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Cards

Term
masseter
Definition
A elevate the mandible, may assist to protract the mandible
O zygomatic arch & zygomatic bone
I angle & ramus of mandible
N trigeminal (cranial nerve V), mandibular division
Term
rectus capitis posterior major
Definition
A rock & tilt head into extension, rotate head to same side
O spinous process of axis (C2)
I inferior nuchal line of occiput
N suboccipital
Term
rectus capitis posterior minor
Definition
A rock & tilt head into extension, extend upper cervical
O tubercle of posterior arch of atlas (C1)
I inferior nuchal line of occiput
N suboccipital
Term
oblique capitis superior
Definition
A extend upper cervical, laterally flex head to same side
O transverse process of atlas (C1)
I between nuchal lines of occiput
N suboccipital
Term
oblique capitis inferior
Definition
A rotate head to same side
O spinous process of axis (C2)
I transverse process of atlas (C1)
N suboccipital
Term
scalenes
Definition
A unilateral: rotate head & neck to opposite side, laterally flex head & neck to same side
bilateral:elebate ribs during inhalation
bilateral anterior scalenes: flex head & neck
O anterior: transverse processes C3-C6
middle:transverse processes C2-C7
posterior: transverse processes C6-C7
I anterior: rib 1
middle: rib 1
posterior: rib 2
N C(3), 4-8
Term
sternocleidomastoid
Definition
A unilateral: rotate head & neck to opposite side, laterally flex head & neck to same side
bilateral: flex neck, assist to elevate ribcage during inhalation
O sternal head: top of manubrium
clavicular head: medial 1/3 clavicle
I mastoid process of temporal none, lateral portion of superior nuchal line of occiput
N accessory (cranial nerve XI), C2, C3
Term
serratus posterior superior
Definition
A elevate ribs during inhalation
O spinous processes C7-T3
I posterior surface of ribs 2-5
N T1-T4
Term
serratus posterior inferior
Definition
A depress ribs during exhalation
O spinous processes T12-L3
I posterior surface of ribs 9-12
N T9-T12
Term
iliacus
Definition
A with origin fixed: flex the hip, may ER hip
with insertion fixed: flex trunk toward thigh, tilt pelvis posteriorly
O iliac fossa
I lesser trochanter
N femoral, L(1) 2, 3,4
Term
psoas major & minor
Definition
A with origin fixed: flex the hip, may ER the hip
with insertion fixed: flex the trunk toward the thigh, tilt pelvis anteriorly, unilaterally assist to flex lumbar spine
Term
spinalis
Definition
A unilateral: trunk lateral flexion to same side
bilateral: extend trunk
O spinous process of upper lumbar & lower thoracic vertebrae, ligamentum nuchae, spinous process of C7
I spinous processes of upper thoracic & cervicals, except C1
N spinal nerves
Term
longissimus
Definition
A unilateral: trunk lateral flexion to same side
bilateral: extend trunk
O common tendon (thoracis), transverse processes of upper 5 thoracic vertebrae
I lower 9 ribs & transverse processes of thoracic vertebrae, transverse processes of cervical vertebrae, mastoid process of temporal bone
N spinal nerves
Term
iliocostalis
Definition
A unilateral: trunk lateral flexion to same side
bilateral: extend trunk
O common tendon (lumborum), posterior surface of ribs 1-12
I transverse process oflumbar vertebrae 1-3 and posterior surface ofribs 1-12,transverse processes ofllwer cervicals
N spinal nerves
Term
quadratus lumborum
Definition
A unilateral: lateral pelvic tilt, trunk lateral flexion, assist to extend trunk
bilateral: fix rib 12 during inhalation & exhalation
O posterior iliac crest
I rib 12, transverse process of lumbar vertebrae 1-4
N: Lumbar plexus, T12, L1, 2, 3
Term
gluteus medius
Definition
A anterior fibers flex, IR & abduct hip
posterior fibers extend, ER & abduct the hip
O gluteal surface of ilium between anterior and posterior gluteal lines, just below iliac crest
I lateral aspect of greater trochanter
N superior gluteal
Term
gluteus minimus
Definition
A abduct, IR & flex hip
O gluteal surface of ilium between anterior & inferior gluteal lines
I anterior border greater trochanter
N superior gluteal
Term
gluteus maximus
Definition
A all fibers abduct, extend & ER hip
lower fibers adduct hip
O coccyx, edge of sacrum, posterior iliac crest, sacrotuberous & sacroiliac ligaments
I upper fibers iliotibial tract
lower fibers gluteal tuberosity
N inferior gluteal
Term
piriformis
Definition
A ER hip, abduct hip when hip is flexed
O anterior surface of sacrum
I superior aspect greater trochanter
N sacral plexus
Term
superior gemellus
Definition
A ER hip
O ischial spine
I medial surface greater trochanter
N sacral plexus
Term
rectus femoris
Definition
A flex hip, extend knee
O AIIS
I tibial tuberosity via patellar tendon
N femoral
Term
vatus medialis
Definition
A extend knee
O medial lip of linea aspera
I tibial tuberosity via patellar tendon
N femoral
Term
vastus lateralis
Definition
A extend knee
O lateral lip of linea aspera, greater trochanter & gluteal tuberosity
N femoral
Term
vastus intermedius
Definition
A extend knee
O anterior & lateral shaft of femur
I tibial tuberosity via patellar tendon
N femoral
Term
tensor fascia latae
Definition
A abduct, flex, IR hip
O iliac crest posterior to ASIS
I iliotibial tract
N superior gluteal
Term
gracilis
Definition
A adduct, IR hip, flex knee, IR flexed knee
O inferior pubic ramus
I proximal medial shaft of tibia at pes anserinus tendon
N obturator
Term
biceps femoris
Definition
A flex knee, ER flexed knee
long head: extend hip, assist ER hip, posterior pelvic tilt
O long head: ischial tuberosity
short head lateral lip linea aspera
I fibular head
N long head: tibial branch sciatic
short head: peroneal branch sciatic
Term
semimembranosus
Definition
A flex knee, IR flexed knee, extend & assist IR hip, posterior pelvic tilt
O ischial tuberosity
I posterior aspect medial condyle of tibia
N tibial branch sciatic
Term
semitendinosus
Definition
A flex knee, IR flexed knee, extend & assist to IR hip, posterior pelvic tilt
O ischial tuberosity
I proximal medial shaft of tibia at pes anserinus tendon
N tibial branch sciatic
Term
sartorius
Definition
A flex, ER, abduct hip, flex knee, IR flexed knee
O ASIS
I proximal medial shaft of ibia at pes anserinus tendon
N femoral
Term
gastrocnemius
Definition
A flex knee, plantar flex ankle
O posterior surfaces of condyles of femur
I calcaneus via calcaneal tendon
N tibial
Term
soleus
Definition
A plantar flex ankle
O soleal line, proximal posterior tibia, posterior aspect of head of fibula
I calcaneus via calcaneal tendon
N tibial
Term
extensor hallucis longus
Definition
A extend 1st toe, dorsiflex, invert foot
O middle anterior surface of fibula, interosseous membrane
I distal phalange of hallux
N deep peroneal
Term
extensor digitorum longus
Definition
A extend toes 2-5, dorsiflex, evert foot
O lateral condyle of tibia, proximal anterior shaft of fibula, interosseous membrane
I middle & distal phalanges of toes 2-5
N peroneal
Term
tibialis anterior
Definition
A dorsiflex, invert foot
O lateral condyle & proximal lateral shaft of tibia, interosseous membrane
I medial cuneiform & base of 1st metatarsal
N deep peroneal
Term
tibialis posterior
Definition
A plantar flex, invert foot
O proximal posterior shafts of tibia & fibula, interosseous membrane
I all 5 tarsal bones, bases of m2-4 metatarsals
N tibial
Term
peroneus longus
Definition
A evert & assist to plntar flex foot
O head of fibula, proximal 2/3 of lateral fibula
N superficial peroneal
Term
peroneus brevis
Definition
A evert, assist to plantar flex foot
O distal 2/3 of lateral fibula
I tuberosity of 5th metatarsal
N superficial peroneal
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