Anatomy 101 Lab Exam 3 Muscles Flashcards by McKenna Strong

External oblique action

Flexes and laterally bends trunk
Compresses abdominal cavity

How well did you know this?

Not at all

Perfectly

Internal oblique action

Flexes and laterally bends trunk
Compresses abdominal cavity

How well did you know this?

Not at all

Perfectly

Transversus abdominis action

Compresses abdominal cavity

How well did you know this?

Not at all

Perfectly

Rectus abdominis action

Flexes trunk with vertebral column fixed
Compresses abdominal cavity

How well did you know this?

Not at all

Perfectly

Frontalis (frontal belly of occipitofrontalis) action

Raises eyebrows
Wrinkles skin of forehead horizontally

How well did you know this?

Not at all

Perfectly

Occipitalis (occipital belly of occipitofrontalis) action

Pulls scalp posteriorly

How well did you know this?

Not at all

Perfectly

Orbicularis oculi action

Closes eye
Pulls skin around eyes (blinking/winking)

How well did you know this?

Not at all

Perfectly

Orbicularis oris action

Closes and protrudes lips (kiss)

How well did you know this?

Not at all

Perfectly

Buccinator action

Manipulates food while chewing
Expels air through pursed lips (blowing trumpet)

How well did you know this?

Not at all

Perfectly

Zygomaticus major action

Pulls angle of mouth superiority and laterally

How well did you know this?

Not at all

Perfectly

Zygomaticus minor action

Raises lateral portion of upper lip to expose upper teeth

How well did you know this?

Not at all

Perfectly

Platysma action

Lowers lower lip
Opens mouth by depressing mandible

How well did you know this?

Not at all

Perfectly

Masseter action

Elevates mandible
Prime mover of jaw

How well did you know this?

Not at all

Perfectly

Temporalis action

Elevates and retracts mandible

How well did you know this?

Not at all

Perfectly

Digastric action

Depresses mandible
Fixation of hyoid bone during swallowing

How well did you know this?

Not at all

Perfectly

Mylohyoid action

Elevates hyoid bone and floor of mouth, assisting tongue to push food toward pharynx

How well did you know this?

Not at all

Perfectly

Sternohyoid action

Depresses hyoid bone and larynx

How well did you know this?

Not at all

Perfectly

Sternocleidomastoid action

Bilateral: flexes head (chin moves toward chest)
Unilateral: flex and rotate head toward opposite side
Accessory muscle of respiration

How well did you know this?

Not at all

Perfectly

Scalenes (anterior, middle, posterior) actions

Bilateral: flexes head (when 1st rib is fixed)
Elevate rib cage with vertebral column during forced inspiration (when neck is fixed)
Unilateral: moves head laterally
Accessory muscle of respiration

How well did you know this?

Not at all

Perfectly

Pectoralis major action

Flexes and adducts arm
Rotates arm medially

How well did you know this?

Not at all

Perfectly

Pectoralis minor action

Protracts and depresses scapula

How well did you know this?

Not at all

Perfectly

Serratus anterior action

Protracts scapula
Assists in upward rotation of scapula

How well did you know this?

Not at all

Perfectly

Diaphragm action

Flattens to lower floor of thoracic cavity to increase volume and decrease pressure, causing inspiration

How well did you know this?

Not at all

Perfectly

External intercostals action

Elevates rib cage, spreading ribs, assisting in inspiration

How well did you know this?

Not at all

Perfectly

Internal intercostals action

Depresses the rib cage, pulling ribs closer together, assisting in expiration

Trapezius action

Elevates scapula Rotates scapula upwards Extends head

Deltoid action

Abducts arm Secondarily flexes and extends arm

Latissimus dorsi action

Adducts and extends arm Rotates arm medially

Supraspinatus action

Assists abduction of arm Holds humerus and stabilizes shoulder joint

Infraspinatus action

Laterally rotates humerus Stabilizes shoulder joint

Subscapularis action

Adducts and rotates arm medially Stabilizes shoulder joint

Teres minor action

Laterally rotates humerus Stabilizes shoulder joint

Teres major action

Adducts, extends and rotates arm laterally

Levator scapulae action

Elevates scapula

Rhomboid minor action

Retracts scapula

Rhomboid major action

Retracts scapula

Splenius capitis action

Extends head Rotates head to same side as contracting muscle

Iliacus action

Flexes thigh and stabilizes it in standing

Psoas major action

flexes thigh laterally bends vertebral column

Sartorius action

Flexes, abducts and laterally rotates thigh Flexes leg at knee

Recuts femoris action

Extends knee Flexes knee

Vastus lateralis action

Extend knee Stabilizes patella

Vastus medialis action

Extend knee Stabilizes patella

Vastus intermedius action

Extends knee

Pectineus action

Adducts, flexes and medially rotates thigh

Adductor longus action

Adducts, medially rotates and flexes thigh

Adductor magnus action

Adducts and medially rotates thigh

Adductor brevis action

Adducts, medially rotates and flexes thigh

Gracilis action

Adducts and medially rotates thigh Flexes leg

Biceps femoris action

Extends thigh Flexes knee

Semitendinosus action

Extends thigh Flexes knee

Semimembranosus action

Extends thigh Flexes knee

Gluteus Maximus action

Extends, abducts and laterally rotates thigh

Gluteus medius action

Abducts and medially rotates thigh Stabilizes pelvis while walking

Tensor fascia latae action

Abducts, flexes and medially rotates thigh

Tibilais anterior action

Dorsiflexes foot Inverts foot

Extensor digitorum longus action

Dorsiflexes foot Extends toes

Extensor hallucis longus action

Dorsiflexes foot Extends big toe

Fibularis (peroneus) longus action

Everts foot Plantar flexes foot

Fibularis (peroneus) brevis action

Everts foot Plantar flexes foot

Gastrocnemius action

Plantar flexes foot Assists with flexing knee

Soles action

Plantar flexes foot

Plantaris action

Plantar flexes foot Assists with flexing knee

Flexor digitorum longus action

Flexes toes Stabilizes foot

Flexor hallicus longus action

Flexes big toe

Biceps brachii action

Flexes elbow Supinates forearm

Brachialis action

Flexes elbow

Triceps brachii action

Extends elbow

Pronation Teres action

Pronates forearm

Flexor carpi radialis action

Flexes wrist Abducts hand

Palmaris longus action

Flexes wrist Tenses dense connective tissue of palm

Flexor carpi ulnaris action

Flexes wrist Adducts hand

Extensor carpi radialis longus action

Extends wrist Abducts hand

Extensor carpi radialis brevis action

Extends wrist Abducts hand

Extensor digitorum action

Extends wrist Extends fingers

Extensor digiti minimi action

Extends pinky

Extensor carpi ulnaris action

Extends wrist Adducts hands

Brachioradialis action

Flexes elbow

Skeletal muscle is

Striated Multinucleated Voluntary

Cardiac muscle is

Striated Single nucleus Involuntary

Smooth muscle is

Non-striated Single nucleus Involuntary

Maximus means

largest

Major means

larger

magnus means

large

medius means

intermediate

minor means

smaller

minimus means

smallest

longus means

long

brevis means

short

latissimus means

widest

longissimus means

longest

vastus means

huge

deltoid means

triangular

trapezius means

trapezoid

serratus means

saw toothed

rhomboid means

diamond

orbicularis means

circular

platys means

flat

quadratus means

square/4 sides

gracilis means

slender

rectus means

parallel to midline

transversus means

perpendicular to midline

oblique means

diagonial to midline

biceps have

2 heads

triceps have

3 heads

quadriceps have

4 heads

a flexor

decreases joint angle

an extensor

increases joint angle

a levator

raises

a sphincter

decreases the size of the opening

a tensor

makes body parts rigid

a rotator

rotates bone around longitudinal axis

contractility

ability to shorten/contract with force

excitability

responds to stimulus

extensibility

can stretch

elasticity

can return to original resting length after stretching or contracting

gliding movements

simple movements in which flat bone surfaces move back and forth and side to side

Angular movements

increase or decrease the angle between articulating bones

flexion

decrease in angle between articulating bones

extension

increase in angle between articulating bones

hyperextension

continuation of extension beyond normal extension

lateral flexion

movement to the side

abduction

movement of bone away from midline/body

adduction

movement of a bone toward the midline/body

circumduction

movement of body part in a circle

rotation

a bone revolves around its own longitudinal axis

elevation

upward movement of a body part

depression

downward movement of a part of the body

protraction

movement of a part of the body anteriorly

retraction

movement of a protracted part of the body back to normal

inversion

movement of foot medially

eversion

movement of sole laterally

dorsiflexion

bending of foot at ankle in upward direction

plantar flextion

bending of the foot at ankle in a downward direction

supination

movement of forearm so palm is upward

pronation

movement of forearm so palm is downward

opposition

movement of thumb in which thumb moves across palm to touch tips of fingers on same hand

isotonic contraction

movement (concentric or eccentric)

isometric contraction

no movement

concentric movement

when the muscle shortens

eccentric movement

when the muscle lengthens

iliopsoas action

flexes hip