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86 Cards in this Set

  • Front
  • Back
region and action of pronator teres
o: medial epicondyle of humerus, coronoid process
i: middle lateral side of radius
a: pronation
region and action of pronator quadrates
o: lower 1/4 of ulna
i: lower 1/4 of radius
deepest muscle of distal forearm
a: pronation
region and action of Brachioradialis
o: lateral supracondylar ridge of humerus
i: styloid process of radius
a: elbow flexion, assists in suppination
region and action of the brachialis
o: lower 1/3 of anterior part of humerus
i: coronoid process
a: elbow flexion
region and action of Biceps Brachii
2 origins:
longhead: glenoid fossa
short head: coracoid process
i: radial tuberosity
a: elbow and shoulder flexion, supination
region of supinator and common injury
o: lateral epicondyle of humerus, proximal end of ulna
i: upper lateral 1/3 of radius
tennis elbow
region and action of aconeus
very small forearm muscle
o: lateral epicondyle of humerus
i: olecranon process
stabilize elbow joint, elbow extension, synergist to triceps
region and action of triceps brachii
origin (3):
longhead: inferior glenoid *
lateral head: upper lateral, posterior 1/2 of humerus
medial head: lower 2/3 of medial posterior humerus
i: olecranon process
elbow and shoulder extension*
little league (golfer's) elbow
aka medial epicondylitis
wrist flexion, similar to tennis elbow
tennis elbow
aka lateral epicondylitis (humerus)
caused by overuse/repetitve strain from repeated wrist extension.
small tears develope in the tendon, this leads to irritation and pain where the tendon is attached to the bone
levator costarum
increases thoracic cavity through rib elevation.
r: in between ribs
diaphragm
dome shaped at the level of the xiphoid process and last 7 ribs
a: contracts downward to enlarge thoracic cavity during respiration
primary respiration muscles
diaphragm, external intercostals, internal intercostals
quadrates lumborum
lower trunk extensor (posterior side)
o: posterior part of iliac crest
i: 12th rib, transverse process of L1-L4
a: lateral flexion to the same side, extension (hyper)
transverse abdominis
deepest of all abdominal muscles
compresses organs and keeps everything in place.
o: inguinal ligament, iliac crest
i: linea alba (fibrous connective tissue that comes down)
Rectus abdominis
(six packs) four bellies seperated by tendonous band
o: pubic symphysis
i: ribs 5-7, xiphoid process
a: flexion of the trunk (sit ups)
internal obliques
o: iliac crest, inguinal ligament
i: pubic bone, 7th-9th ribs
a: lateral flexion to the same side, trunk flexion, rotation to the same side
external obliques
most superficial abdominal muscle
downward medial fibers
o: lower 8 ribs
i: iliac crest, linea alba
a: lateral flexion (to the same side), trunk flexion, rotation to the opposite side
semispinalis-capitalis, cervicis, thoracis
(hyper)extension, rotation to the opposite side
deep spinal muscle
serratus posterior inferior
increase thoracic cavity
rib depression
r: lower ribs
subcostals
decrease thoracic cavity
rib depression
inner surface of the ribs
transverse thoracis
decrease thoracic cavity
rib depression
inner surface of costal cartilage
erector spinea group
spinalis capitus, thoracis, cervicis
longissimus capitus, thoracis, cervicis
illiocostalis cervicis, thoracis, lumborum
longus colli group
deep muscle of spine
anterior cervical region
a: cervical spine flexion
interspinalis
deep spinal muscle
spinous process to spinous process
a: extension (hyper)
intertransversarii
deep spinal muscle
r: transverse process to transverse process
a: lateral flexion
muscles that decrease thoracic cavity
SIiTt
subcostales
internal intercostals
transverse thoracis
muscles that increase the thoracic cavity
diaphragm
external intercostals
levator costarum
scalenus group
serratus posterior superior
serratus posterior inferor
internal intercostals
attach between each rib
decrease cavity and aids in forced expiration
scalenus group
increase thoracic cavity
rib 1 elevation, cervical flexion, lateral flexion, rotation
r: transverse process to rib 1
serratus posterior superior
increase thoracic cavity
rib elevation
r: upper ribs
external intercostals and fiber direction
attach between each rib
rib elevation to enlarge cavity during respiration
*down ward and medial fibers
serratus anterior
anterior scapular muscle
"boxer's muscle"
o: ribs 1-9
i: anterior vertebral border of the scapula
a: protraction, upward rotation
protraction
shoulders come toward each other in front
retraction
shoulder blades come together in the back
posterior scapular muscles
levator scapulae
rhomboids (minor and major)
trapezius
muscle properties (eeect)
extensibility: ability to stretch
elasticity: ability to return to resting length
excitability: ability to react to stimulii
contractibility: shorten/contract
tonicity: ability to gain tone. (hardness/softness)
anterior shoulder cap muscles
coracobrachialis
pectoralis major
subscapularis
coracobrachialis
anterior shoulder cap muscle
o: coracoid process
i: midway down the humerus (anteriomedial surface)
a: flexion, adduction
pectoralis major
anterior shoulder cap muscle
o: clavicle, sternum
i: lateral lip of intertuburcular groove
a: adduction, internal rotation, flexion, horizontal adduction
subscapularis
*rotator cuff muscle
anterior shoulder cap
o: subscapular fossa
i: lesser tuberosity of humerus
a: internal rotation, stabilization
posterior shoulder cap muscles
teres major
latissimus dorsi
infraspinatus
teres minor
teres major
posterior shoulder cap muscles
o: posterior lower 1/3 of axillary border of scapula
i: medial lip of intertubercular groove
a: internal rotation, adduction, (hyper)extension
latissimus dorsi
posterior shoulder cap muscle
o: T7-L5, illiac crest
i: intertubercular groove (humerus)
a: adduction, internal rotation, (hyper)extension
infraspinatus
rotator cuff muscle
posterior shoulder cap
o: infraspinous fossa
i: greater tuberosity
a: external rotation, horizantal abduction, stabilization
teres minor
rotator cuff muscle
posterior shoulder cap
o: upper 2/3 of axillary border of scapula
i: greater tuberosity
a: external rotation, stabilization
rotator cuff muscles
supraspinatus (superior)
infraspinatus (posterior)
teres minor (posterior)
subscapularis
anterior scapular muscles
subclavius
pectoralis minor
serratus anterior (boxer's muscle)
scapular movements possible
elevation, depression, retraction (adduction), protraction (abduction), downward rotation, upward rotation
rhomboids (minor & major)
posterior scapular muscles
o: c7-t5
i: vertebral border of the scapula
a: retraction, downward rotation, elevation
levator scapulae
posterior scapular muscle
o: cervical vertebrae 1-4
i: vertebral border of scapula
a: elevation, assists in retraction and downward rotation
properties of tendons
extensibility and elasticity
(cannot contract)
isotonic
concentric: muscle is shortening
muscle torque is greater than the resistance
eccentric: muscle is lengthening
torque of muscle is less than the resistance
isometric
static: torque of muscle equals the resistance.
muscle is contracted but not moving
muscle fiber layers
1. epimysium (outside)
2. perimysium
3. endomysium (encases each individual muscle fiber)
sarcomere
functional unit of skeletal muscle
made up of actin and myosin
z line
z line to z line is 1 sarcomere
(dark lines)
a band
both proteins overlap eachother (myosin and actin)
dark area
i band
actin (thinner protein)
light area
H zone
gap in the a band
(visible only when the muscle is relaxed)
early anatomist classification of muscles
skeletal muscles
visceral
cardiac
histology classification (under a microscope)
striated (light and dark)
smooth
branched striated
nerve control classification
voluntary
involuntary
involuntary
skeletal muscle
striated, voluntary
visceral
smooth, involuntary (stomach, intestine)
cardiac
branched striated, involuntary
myosin and how it interacts with actin
thicker protein, has crossbridges that attach to the actin during muscle action to help with the contraction process
sliding filament theory
sliding of actin past myosin generates muscle tension
fiber types description and use
slow oxidative: slow twitch, high resistance to fatigue *marathon
fast oxidative glycolitic: fast twitch, intermediate resistance to fatigue (not completely anaerobic) *short high intensity events like 400 m
fast glycolitic: very fast, low resistance to fatigue *quick explosive movements like 50 yd dash
fusiform muscle
runs parallel, longitudinally
best known for speed of contraction and range of motion
*biceps brachii
pennate
come off a central tendon (uni, bi...) looks like a feather
amplifies force
flat muscle to a central tendon, better stability, less flexibility
*deltoids
quadrate/ triangular
four distinct sides/ three distinct sides
muscles create movement by...
pulling. muscles cannot push
hypertrophy/atrophy
increase muscle cell size/decrease muscle cell size
(cannot make more muscle cells
blood supply to muscles
sedentary person: 3-4 capillaries
trained athlete: 5-7 capillaries
100x more blood exercising than resting
tendon/ ligament
muscle to bone/ bone to bone
how muscles are named
shape, size, action, location, attachments, directions of fibers, number of divisions within the muscle
subclavius
anterior scapular muscle
o: 1st rib
i: inferior middle surface of the clavicle
a: depresses clavicle, stabilizes shoulder girdle
pectoralis minor
anterior scapular muscle
o: ribs 3-5
i: coracoid
a: depression, downward rotation, protraction
supraspinatus
superior rotator cuff muscle
o: supraspinous fossa
i: greater tuberosity of the humerus
a: abduction, stabilization
biceps brachii
biarticular
o: longhead: supraglenoid tubercle
shorthead: coracoid process
i: radial tuberosity
a: elbow and shoulder flexion, suppination
triceps brachii
biarticular
o(3): long head: infraglenoid tubercle of scapula
lateral head: upper lateral posterior 1/2 of humerus
medial head: lower 2/3 of medial posterior humerus
i: olecranon process
a: elbow and shoulder extension
trapezius
posterior scapular muscle (superficial muscle, can be palpated)
o: occipital protuberance to c7-t12
i: (3) lateral 1/3 of clavicle, acromion process, spine of the scapula
a: most superior: elevation/depression of scapula
middle: retraction of scapula
most inferior: upward rotation of scapula
deltoids (3 groups)
1. anterior:
o: lateral 1/3 of clavicle
i: deltoid tuberosity
a: flexion, internal rotation, horizontal adduction
2: middle
o: acromion process
i: deltoid tuberosity
a: abduction
3. posterior
o: spine of scapula
i: deltoid tuberosity
a: extension (hyper) external rotation, horizontal abduction
rotator cuff different than other three (and how)
subscapularis inserts on the lesser tuberosity of the humerus rather than the greater tuberosity
rotator cuff different than other three (and how)
subscapularis inserts on the lesser tuberosity of the humerus rather than the greater tuberosity