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Muscles: facial, chest, back, abs
muscle names & functions
47
Anatomy
11th Grade
02/27/2012

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Term
Function of occipitofrontalis
Definition
raises eyebrows
Term
Function of orbicularis oris
Definition
move lips for speech & kissing
Term
Function of orbicularis oculi
Definition
closes eyes
Term
Function of zygomatic major
Definition
smiling
Term
Function of buccinator
Definition
shapes cheeks for blowing/sucking/whistling
Term
Function of sternocleidomastoid
Definition
turns head from side to side
Term
Origins of sternocleidomastoid
Definition
manubrium of sternum & medial portion of clavicle
Term
Insertions of sternocleidomastoid
Definition
mastoid process of temporal bone & occipital bone
Term
Function of masseter
Definition
closes mouth for chewing
Term
Origins of masseter
Definition
maxilla & zygomatic arch
Term
Insertion of masseter
Definition
mandible
Term
Function of temporalis
Definition
closes mouth for chewing
Term
Function of lateral pterygoid
Definition
closes mouth for chewing and moves jaw side to side
Term
Functions of pectoralis major
Definition
rotates arm medially, adducts arm, flexes are at shoulder
Term
Origins of pectoralis major
Definition
clavicle & sternum/catilages of 2-6 ribs
Term
Insertion of pectoralis major
Definition
humerus
Term
Functions of pectoralis minor
Definition
moves scapula down/forward, moves ribs up & out during forces inhalation
Term
Functions of serratus anterior
Definition
moves scapula up, forward & laterally
Term
Function of diaphragm
Definition
contracts & flattens to cause inhalation, relaxes to cause exhalation
Term
Function of diaphragm
Definition
contracts & flattens to cause inhalation, relaxes to cause exhalation
Term
Function of internal intercostals
Definition
aid diaphragm during forced exhalation, depresses rib cage
Term
Function of external intercostals
Definition
aid diaphragm during relaxed breathing, elevate rib cage
Term
Function of latissimus dorsi
Definition
adduction & extention of arm at shoulder, rotates arm medially
Term
Functions of trapezius
Definition
elevates clavicle, moves scapula medially/up/and rotates, extention of head, elevates/depresses shoulders
Term
Origins of trapezius
Definition
occipital bone, spines of 7th cervical & all thoracic vertebrae
Term
Insertions of trapezius
Definition
clavicle & scapula
Term
Functions of rhomboid major
Definition
elevates scapula, rotates scapula backward & downward, moves scapula medially
Term
Functions of levator scapulae
Definition
elevates scapula, rotates scapula downward
Term
Functions of deltoid
Definition
abducts, flexes, extends & roates arm at shoulder
Term
Origins of deltoid
Definition
clavicle & scapula
Term
Insertion of deltoid
Definition
humerus
Term
Define aponeurosis
Definition
broad, flat tendon
Term
Where is the linea alba found
Definition
runs down the center of the abdomen
Term
Where does the linea alba connect to?
Definition
xiphoid process & pubic symphysis
Term
Where are the tendinous intersections found?
Definition
run transversely across abdomen
Term
Where is the inguinal ligament found?
Definition
inferior border of external oblique aponeurosis
Term
What is an inguinal hernia?
Definition
Part of the inguinal ligament separates/ruptures allowing part of the small intestines to protrude though
Term
Functions of the rectus abdominis
Definition
compress abdomen, flexion of vertebral column
Term
Origin of rectus abdominis
Definition
pubis & pubic symphysis
Term
Insertions of rectus abdominis
Definition
xiphoid process & rib cartilages 5-7
Term
Functions of external oblique
Definition
compress abdomen & flexes vertebral column if both are contracted, bends vertebral column laterally if one is contracted
Term
Functions in internal obliques
Definition
compress abdomen & flexes vertebral column if both are contracted, bends vertebral column laterally if one is contracted
Term
Function of transverse abdominis
Definition
compresses abdomen
Term
In which direction do the fibers of the rectus abdominis run?
Definition
parallel to the midline
Term
In which direction do the fibers of the external obliques run?
Definition
diagonally, form a "V" with midline
Term
In which direction do the fibers of the internal obliques run?
Definition
diagonally, form an "A" with the midline
Term
In which direction do the fibers of the transverse abdominis run?
Definition
perpendicular to the midline
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