8 Flashcards
_____ are the motors of movement
muscles
where do muscle attach on either side of moveable joints
tendons
bones
climara
bones/tendons
NAMING OF MUSCLES
Location
shape
size
direction
attachment location
action of muscle
the gluteus maximus follows what feature of naming of muscles
shape of muscle
number of origins
direction of the muscle
action of the muscle
relative size of muscle
relative size of muscle
how many origins does the bicep have
3
2
4
12
6
2
most muscle span joints and are attached indirectly via either a ________ or _______ in at least __ places
tendon, aponeurosis, 2
muscle responsible for movement is the
antagonist
agonist
agonist
trunk
obliques
agonist
the tricep brachi opposes elbow flexion this would be known as an
antagonist
define synergist + example
promote same movement as agonist
prevent undesirable movement
fixator
back muscle fix trunk while arm lifts glass to drink
which is not a synergist
brachialis
triceps brachii
back muscles
triceps brachii
what is the fine layer of CT that surrounds each muscle fiber called?
Epimysium
deep fascia
perimysium
endomysium
fascicles
endomysium
what sheath specifically surrounds a fascicle
Epimysium
deep fascia
perimysium
endomysium
fascicles
perimysium
define epimysium
dense fibrous connective tissue that surrounds and holds together a bundle of fascicles forming the outside layer of a single muscle
what holds together several layers of muscles into a functional group (hamstrings and quadriceps)
Epimysium
deep fascia
perimysium
endomysium
fascicles
deep fascia
the muscle that is around our mouth is
convergent
circular
parallel
bipennate
multipennate
circular
a muscle that is wide or fan shaped and converges towards a single tendon for insertion is
convergent
circular
parallel
bipennate
multipennate
convergent
a sartorius or biceps brachii is an example of a
convergent muscle
circular muscle
parallel muscle
bipennate muscle
multipennate muscle
parallel muscle
define pennate
short fascicles attached obliquely to central tendon
difference between insertion and origin
insertion is attachment of bone that moves during contraction
origin is attachment that doesn’t moves during muscle contraction
which muscle pulls the scalp posteriorly
zygomaticus
epicranius
mentallis
platysma
buccinator
epicranius
orbicularis oculi surrounds the
eye
mouth
mandible
occipital belly
chest
eye
what muscle extends from cheek to corner of the mouth to smile
epicranius
mentallis
zygomaticus
platysma
buccinator
zygomaticus
What would happen if a person was missing the orbicularis oris muscle
there would be no flexion of the elbow
the mandible would not depress
the person would not be able to raise their eyebrows
the person would be unable to close, purse, or protrude your lips
the person would not be able to wrinkle their chin
the person would be unable to close, purse, or protrude your lips
what is the job of the mentallis
pout and wrinkle chin
what does the buccinator not help with
whistling
closing the lips
sucking
holding food while chewing
closing the lips
what muscle extends from mandible to inferior tongue and hyoid bone to help w/ tongue protrusion and anchors tongue during respiration
genioglossus
prime mover for jaw closure is the
temporalis
medial pterygoid
masseter
masseter
what muscle originates from sphenoid bone and responsible for grinding
temporalis
medial and lateral pterygoid
masseter
medial and lateral pterygoid
what muscle elevates and retracts mandible to close jaw
temporalis
medial and lateral pterygoid
masseter
temporalis
bilateral contraction of sternocleidomastoid vs unilateral contraction
head flexion
head rotation to opposite side
the erector spinae has how many columns of muscles
3
where the erector spinae extend from
iliac crest, vertebrae, and ribs
what bone acts as primary back movers for back extensions
erector spinae
how many pairs does the external intercostal have
11 muscle pairs
what muscle is being contracted during breathing in
external intercostals or internal intercostals
external intercostals
what muscle is being contracted during breathing out
external intercostals or internal intercostals
internal intercostals
external intercostals vs internal intercostals
11 rib pairs above
11 rib pairs below
what happens when the diaphram contract
it produces inspiration
