Bio 212 Practical 2

sartorius action

crosses both hip and knee joints

gracilis action

leg adduction; knee flexion

tensor fasciae latae action

stabilizes pelvis during walking

biceps femoris origin

ischial tuberosity

biceps femoris action

primary knee flexor

rectus femoris origin

hip/pelvic girdle

rectus femoris insertion

deep in rectus femoris

rectus femoris action

extends knee

vastus medialis insertion

tibial tuberosity

vastus medialis action

extends knee

vastus intermedius insertion

tibial tuberosity

vastus intermedius action

extends knee

vastus lateralis insertion

via patellar ligament

vastus lateralis action

extends knee

adductor femoris action

adducts the thigh

adductor longus action

adducts the thigh

semimembranosus origin

ischial tuberosity

semimembranosus insertion

medial/lateral surface of tibia

semimembranosus action

primary knee flexor

semitendinosus insertion

tibia

semitendinosus action

flexes the knee

gluteus maximus insertion

femur

gluteus maximus action

primary leg extensor

gluteus medius insertion

greater trochanter of femur

gluteus medius action

primary adductor

gastrocnemius insertion

Achilles tendon

gastrocnemius action

foot eversion and plantar flexion

soleus insertion

Achilles tendon

soleus action

stabilizes ankle joint

peroneus longus action

lateral lower leg

extensor digitorum longus insertion

phalanges of toes 2–5

extensor digitorum longus action

extends digits

tibialis anterior insertion

cuneiform

tibialis anterior action

dorsal flexion

flexor digitorum longus insertion

distal phalanges of toes 2–5

flexor digitorum longus action

flexes toes

external oblique action

lateral spine flexion; side crunches; torsional movement

internal oblique action

lateral spine flexion; side crunches; torsional movement

transverse abdominis action

compresses internal organs; core stability

rectus abdominis action

spine flexion

pectoralis major origin

head of clavicle; sternal head—sternum and upper 6 ribs

pectoralis major insertion

bicipital groove

pectoralis major action

adducts and medially rotates arm

pectoralis minor origin

third, fourth, and fifth rib

pectoralis minor insertion

coracoid process

pectoralis minor action

scapular stabilization

serratus ventralis action

raises arms up/guard stance

scalenes action

neck flexion, rotation, and cervical-spine stabilization

external intercostals origin

inferior border of the ribs

external intercostals insertion

superior border of the ribs

external intercostals action

inspiration

internal intercostals origin

inferior border of the ribs

internal intercostals insertion

superior border of the ribs

internal intercostals action

expiration

masseter origin

zygomatic arch

masseter insertion

along the inferior border of the mandible

masseter action

elevation, closing mouth, and moving mouth in different directions

mylohyoid action

elevates hyoid; swallowing and speech

digastric insertion

body of hyoid bone

digastric action

depresses mandible and elevates hyoid

sternohyoid origin

manubrium

sternohyoid insertion

inferior border of hyoid bone

sternohyoid action

lowers hyoid; swallowing and speech

sternomastoid origin

clavicular head

sternomastoid insertion

mastoid process

sternomastoid action

unilateral contraction

spinotrapezius action

supports scapula; draws scapula dorsally and caudally

acromiotrapezius action

retraction and stabilization of the scapula

clavotrapezius action

draws clavicle dorsally toward head

spinodeltoid action

retracts and abducts humerus

acromiodeltoid action

abducts humerus

clavodeltoid action

adducts humerus; provides shoulder flexion

levator scapulae ventralis action

scapular elevation

latissimus dorsi action

arm adduction and arm extension

rhomboideus origin

vertebrae

rhomboideus insertion

medial border of scapula

rhomboideus action

retracts scapula and keeps it in place

infraspinatus action

involved in lateral rotation and shoulder stabilization

splenius action

head extension and stabilization

supraspinatus action

initiates abduction of humerus

biceps brachii insertion

radial tuberosity

biceps brachii action

elbow flexion and forearm supination

brachialis insertion

coronoid process and ulnar tuberosity

brachialis action

flexion of forearm

triceps brachii insertion

olecranon process

triceps brachii action

elbow extension

brachioradialis origin

lateral humerus

brachioradialis action

flexes forearm

what muscle is this? 7

sartorius

what muscle is this? 2

gracilis

what muscle is this? 6

tensor fascia lata

what muscle is this? 2

biceps femoris

what muscle is this? 1

rectus femoris

what muscle is this? 7

vastus medialis

what muscle is this? 1

vastus intermedius

what muscle is this? 5

vastus lateralis

what muscle is this? 8

adductor femoris

what muscle is this? 6

adductor longus

what muscle is this? 5

pectineus