BIOL 252L Lab 6 (Muscles of Trunk and Lower Limbs + Movement)

bilateral splenius group

extension of vertebral column

unilateral splenius group

lateral flexion of vertebral column

bilateral erector spinae group

extension of vertebral column

unilateral erector spinae group

lateral flexion of vertebral column

muscles in erector spinae group (lateral to medial)

iliocostalis, longissimus, spinalis

serratus posterior superior

elevates ribs for inspiration

serratus posterior inferior

depresses ribs for expiration

longus muscles

colli and capitis

longus muscles (colli and capitis)

flexion of neck

scalene muscles

lateral flexion of neck

infrahyoid muscles

depress and stabilize hyoid bone

external intercostal muscles

elevate ribs for inspiration

internal intercostal muscles

depress ribs for expiration

transversus thoracis

depress ribs for expiration

external oblique muscles

compress abdomen in forced expiration

internal oblique muscles

build intra-abdominal pressure for defecation, childbirth, and body-wall

transversus abdominis

rotate lumbar vertebrae

psoas major

flexion of lumbar vertebrae; flexion of hip

quadratus lumborum

lateral flexion of lumbar vertebrae

rectus abdominis

flex vertebral column

perineal muscles

superficial pelvic muscles

muscles in perineal muscles

urogenital triangle, external anal sphincter

urogenital triangle

sexual function and supports pelvic floor

external anal sphincter

voluntary defecation control

pelvic diaphragm

deep pelvic muscles

pelvic diaphragm functions

support rectum, uterus, urinary bladder

maintain intra-abdominal pressure to prevent involuntary urination/defecation

iliacus

flexion of help

iliopsoas

flexion of hip

gluteus maximus

extension of hip

tensor fascia lata

flexion and internal rotation of hip

deep hip rotators

external rotation of hip

iliotibial tract

gluteus maximus + tensor fascia lata

gluteus medius

abduction of hip

gluteus minimus

abduction of hip

gracilis

adduction of hip

adductor magnus

adduction of hip

adductor longus

adduction of hip

adductor brevis

adduction of hip

pectineus

adduction of hip

rectus femoris

extension of knee

vastus medialis

extension of knee

vastus intermedius

extension of knee

vastus lateralis

extension of knee

sartorius

flexion of knee and external rotation of hip

semimembranosus

flexion of knee

semitendinosus

flexion of knee

biceps femoris

flexion of knee

tibialis anterior

dorsiflexion and inversion of talocrural joint

fibularis longus

eversion of talocrural joint

fibularis brevis

eversion of talocrural joint

gastrocnemius

plantarflexion of talocrural joint

soleus

plantarflexion of talocrural joint

plantaris

plantarflexion of talocrural joint

muscles in calcaneal tendon

gastrocnemius, soleus, plantaris

tibialis posterior

plantarflexion and inversion of talocrural joint

popliteus

rotation/unlocking of knee