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Test 2
muscle origins, insertions, and actions
41
Science
Undergraduate 1
03/10/2006

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Cards

Term
Frontalis
Definition
o: galea aponeurotica

i: skin of eyebrow

action: raises eyebrows, pulls scalp forward
Term
Zygomaticus
Definition
o: corner of zygomatic arch

i: orbicularis oris

action: draws mouth up and out; smile
Term
Masseter
Definition
o: zygomatic arch

i: ramus of mandible

action: closes mouth, chewing, protracts mandible
Term
Orbicularis Occuli
Definition
o: medial orbit bones

i: eyelid

action: closes eye
Term
Orbicularis Oris
Definition
o: fascia around lips

i: mucosa of lips

action: closes lips, puckers, shapes lips for speech
Term
Buccinator
Definition
o: maxilla and mandible

i: orbicularis oris

action: compresses cheek, sucking action
Term
Platysma
Definition
o: superior thorax between cartilage of 2nd rib and acromion of scapula

i: mandible and skin of cheek

action: tenses skin of neck, depresses mandible
Term
Sternocleidomastoid
Definition
o: sternum, clavicle

i: mastoid process

action:
-both: flex spine, head down
-one: rotates/turns head
Term
Deltoid
Definition
o: clavicle, scapula

i: humerus

action: abducts, flexes, extends, rotates the arm
Term
Serratus Anterior
Definition
o: ribs 1-8/9 inclusive

i: anterior scapula

action: lateral and upward rotation of scapula, moves ribs if scapula is fixed
Term
Trapezius
Definition
o: occipital bone, all cervical and all thoracic vertebrae

i: clavicle, scapula

action: elevates clavicle, adducts and causes upward rotation of scapula
Term
Latissimus Dorsi
Definition
o: lower thoracic vertebrae, sacral vertebrae, and ribs 9-12

i: humerus

action: extends and adducts arm, rotates arm, draws arm back and down
Term
Teres Major
Definition
o: scapula

i: humerus

action: extends arm, helps adduct arm, medially rotates arm
Term
Pectoralis Major
Definition
o: clavicle, sternum, costal cartilages

i: humerus

action: flexes, adducts, and rotates arm medially
Term
Triceps Brachii
Definition
o: scapula(1) and humerus (2)

i: ulna (olecranon process)

action: extends arm, extends forearm
Term
Biceps Brachii
Definition
o: scapula

i: radius

action: flexes arm, flexes, supinates forearm
Term
Brachialis
Definition
o: humerus

i: ulna

action: flexes forearm
Term
Brachioradialis
Definition
o: humerus

i:radius

action: flexes, supinates forearm
Term
Pronator Teres
Definition
o: humerus and ulna

i: radius

action: pronates forearm
Term
Rectus Abdominis
Definition
o: pubic crest, pubic symphysis

i: xiphoid and costal cartilages of ribs 5-7

action: compresses abdomen, flexes vertebral column
Term
External Oblique
Definition
o: lower 8 ribs

i: iliac crest, linea alba

action:
-both: compresses abdomen
-one: bend vertebrae to the side
Term
Internal Oblique
Definition
o: iliac crest

i: linea alba, lower ribs

action:
-both: compresses abdomen
-one: bend vertebrae to the side
Term
Transversus Abdominis
Definition
o: iliac crest, costal cartilage

i: xiphoid, line alba

action: compresses abdomen
Term
Diaphragm
Definition
o: ribs, sternum, lumbar vertebrae

i: tendon of diaphragm

action: contracts floor of thoracic cavity, breathe in: moves floor down
Term
External Intercostals
Definition
o: lower surfaces of upper ribs

i: upper surfaces of lower ribs

action: pulls ribs up and out, elevates ribs during inhalation
Term
Internal Intercostals
Definition
o: superior margin of lower rib

i: inferior margin of upper rib

action: pulls rib and down, forced exhalation, pushes air out
Term
Gluteus maximus
Definition
o: ilium, sacrum, coccyx

i: femur

action: extends and laterally rotates the thigh
Term
Iliacus
Definition
o: iliac fossa

i: lesser trochanter of femur

action: flexes and laterally rotates thigh, also flexes vertebrae
Term
Psoas
Definition
o: vertebrae T12-L5

i: lesser trochanter of femur

action: flexes and laterally rotates thigh, also flexes vertebrae
Term
Sartorius
Definition
o: anterior superior iliac spine

i: tibia

action: flexes leg, flexes thigh, laterally rotates thigh
Term
Adductor Magnus
Definition
o: ischium

i: femur

action: adducts leg
upper: flexes, medially rotates
lower: extends thigh
Term
Rectus Femoris
Definition
o: anterior inferior iliac spine

i: patella, tibia via patellar tendon

action: extends leg, flexes thigh
Term
Vastus Medialis
Definition
o: linea aspera

i: patella, tibia via patellar tendon

action: extends leg
Term
Vastus Lateralis
Definition
o: linea aspera

i: patella, tibia via patellar tendon

action: extends leg
Term
Vastus Intermedius
Definition
o: femur

i: patella, tibia via patellar tendon

action: extends leg
Term
Biceps Femoris
Definition
o: ischium, femur

i: fibula

action: flexes leg, extends thigh
Term
Semitendinosus
Definition
o: ischium

i: tibia

action: flexes leg, extends thigh
Term
Semimembranosus
Definition
o: ischium

i: tibia, femur

action: flexes leg, extends thigh
Term
Tibialis Anterior
Definition
o: tibia

i: medial cuneiform and 1st metatarsal

action: dorsiflexes and inverts foot
Term
Gastrocnemius
Definition
o: femur

i: calcaneus via calcaneal tendon

action: plantarflexes foot, flexes leg
Term
Soleus
Definition
o: fibula, tibia

i: calcaneal tendon

action: plantarflexes foot
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