anatomy exam 1 Flashcards
what are the functions of the muscular system?
- create movement by working with bones ligaments and tendons
- move food through digestive system
- move blood through body
- provide protection
- produce heat
skeletal muscle
voluntary, striated, multi-nucleated, attached to skeletal system
smooth muscle
involuntary, non-striated, spindle shape, located in blood vessels and walls of digestive track
cardiac muscle
Involuntary, striated, branching cells, single nucleus, walls of heart, intercalated disks
types of movement at synovial joints
hyperextension, extension, flexion. dorsiflexion, plantar flexion, adduction, abduction
Origin
stationary bone
insertion
movable bone
ligament
connects bone to bone
tendon
connect muscle to bone
frontalis muscle
elevates the eyebrow
orbicularis oculi muscle
closes the eyelids and pumps tears from the eyes
zygomaticus major and minor
controls facial expressions
masseter muscle
mastication (chewing)
orbicularis oris muscle
orofacial functions (swallowing, chewing, kissing, pronouncing vowels)
Buccinator muscle
holds cheeks to teeth (chewing)
sternocleidomastoid
tilting head and turning neck
temporalis muscle
close the jaw (crushing and grinding objects between molars
trapezius muscle
pull up shoulders, shrugging
Epicranial aponeurosis
tough layer of dense fibrous connective tissue covering the skull
depressor anguli oris
depress corner of mouth
platysma
myriad of facial expression (sadness, surprise, horror)
Risorius muscle
draws up the angle of the mouth
mentalis muscle
stability to lower lip, allow it to pout
corrugator supercilli muscle
movement of the eyebrows, including frowning
levator labii superious
facial expressions, movement of the mouth and upper lip
depressor labii inferioris
depressed and everts lower lip
trapezuis muscle
stabilize and move the scapula
levator scapulae
elevate the scapula
rhomboid major and minor
retract, elevate and rotate scapula
latissimus dorsi
adduct and rotate the arm at the shoulder joint (pullups)
Deltoid muscle
abduction of the arm
acromion process of scapula
point of attachment for the deltoid
infraspinatus muscle
rotate the shoulder joint and humerus
serratus anterior muscle
pull the scapula forward and around the thorax
teres major and minor
adducts the arm at the shoulder joint
splenius capitis
flex and rotate the head and neck
spenius cervicis
extends neck
semispinalis capitis
neck extension and pull backward
longissimus capitis
rotate the head from side to side, extend head
serratus posterior superior
elevates the ribs during respiration
serratus posterior inferior
depress the ribs during respiration
external abdominal oblique
rotate truck
internal abdominal oblique
flex the truck, defecation, urination, and childbirth
erector spinae group
iliocostalis, longissimus, and spinalis
illiocostalis lumborum
runs from the lower ribs to the ileum; depresses ribs
ligamentum nuchae
tendons and fascia between the posterior muscle of the neck. Covers the spine C1-C6. sustains head weight
mastoid process of temporal bone
allow the attachment of muscles to the head and neck such as the sternocleidomastoid muscle and the splenuis capitis muscle
coracoid process
a short projection from the clavicle to which the biceps brachii attaches