ScoreBuilders Part 1 Flashcards
fibrous joints
(synarthroses) minimal movement. ex: sutures, syndesmosis, gomphosis
cartilaginous joints
(amphiarthroses) has cartilage to connect one bone to another. slightly moveable joints. ex: syndchondrosis, symphysis
synovial joints
(diarthroses) provide free mvmt btwn bones they join. have five characteristics: joint cavity, articular cartilage, synovial membrane and fluid, and fibrous capsule. ex: uniaxial joint (elbow), biaxial (condyloid: finger, saddle: thumb), multi-axial (plane: carpal jts, ball & socket: hip)
shoulder complex articulations
sternoclavicular, acromioclavicular, glenhumeral, scapulothoracic articulation
elbow
hinge joint, reinforced by ulnar collateral and radial collateral ligaments
wrist and hand
radiocarpal and midcarpal joints. mcp joints, prox and distal interphalangeal joints, and cmc joints
hip
ball and socket joint. stability provided at joint by: acetabulum, iliofemoral ligament, pubofemoral ligament, and ischiofemoral ligament
knee
hinge joint. stability by these ligaments: anterior cruciate, posterior cruciate, medial collateral, lateral collateral, ad deep medial capsular
ankle
hinge joint formed by articulation of tibia and fibula w/talus. medial ligaments: deltoid. lateral ligaments: anterior tibiofibular, anterior talofibular, calcaneofibular, lateral talocalcaneal, and posterior talofibular
frontal plane
divides body into anterior and posterior. motions are abduction and adduction, occur around an anterior-posterior axis.
sagittal plane
divides body into right and left sections. flexion and extension occur around a medial=lateral axis.
transverse plane
divides body into upper and lower sections. rotation occurs around vertical axis.
class 1 lever
very few class 1 levers in body. one example is triceps force on olectranon with an external counter force pushing on forearm. (seesaw). axis of rotation is btwn effort (force) and resistance (load).
class 2 lever
resistance (load is btwn axis of rotation and effort (force). length of effort arm is always longer than resistance arm. most instances, gravity is effort and muscle activity is resistance. ex: wheelbarrow
class 3 lever
effort (force) btwn axis of rotation and resistance (load). shoulder abduction with weight at wrist is a class 3 lever example. most common type of lever in body.
ATP-PC system
energy system producing ATP during high intensity, short duration exercise. Phosphocreatine decomposes and releases large amount of energy used to construct ATP. provides energy for muscle contraction for up to 15 seconds.
anaerobic clycolysis
major supplier of ATP during high intensity, short duration activities. 50% slower than ATP-PC system and can provide a person with 30-40 secs of muscle contraction
aerobic metabolism
used predominantly during low intensity, long duration exercises. yields by far the most atp, but requires chemical reactions.
Type 1 Muscle Fibers
Aerobic, Red, Tonic, Slow twitch, Slow-oxidative: low fatigability, high capillary density, high myoglobin content, smaller fibers, extensive blood supply, large amt of mitochondria (ex: marathon, swimming)
Type 2 Muscle Fibers
Anaerobic, White, Phasic, Fast twitch, Fast-glycolytic: high fatigability, low capillary density, low myoglobin content, larger fibers, less blood supply, fewer mitochondria (ex: high jump, sprinting)
muscle receptors: muscle spindle
throughout belly of muscle. send info to nervous system about muscle LENGTH and or RATE of change of LENGTH. important in control of posture and involuntary mvmts.
golgi tendon organ
sensory receptors through which muscle tendons pass immediately beyond attachment to muscle fibers. very sensitive to TENSION when produced from an active muscle contraction. average of 10-15 muscle fibers are connected in series with each golgi tendon organ. stimulated through the tension produced by muscle fibers.
concentric contraction
when muscle shortens while developing tension
eccentric contraction
occurs when muscle lengthens while developing tension
isometric contraction
isometric contraction occurs when tension develops but no change in length of muscle
isotonic
occurs when muscle shortens or lengthens while resisting a constant load
isokinetic contraction
isokinetic contraction occurs when tension developed by muscle is maximal over full range of motion while shortening or lengthening at a constant speed.
open-chain activity
open-chain activity involve distal segment, usually hand or foot, moving freely in space. example: kicking a ball with LE
closed-chain activity
involve body moving over a fixed distal segment. example: squat lift
densitometry: hydrostatic weighing
method of calculating density of body by immersing in water and measuring amt of water that becomes displaced.
densitometry: plethysmography
method of calculating body density utilizing amt of air displacement during testing within a closed chamber.
anthropometry: skinfold msrmt
determines overall % of body fat thru msrmt of 9 standardized sites.
end feel
type of resistance that is felt when passively moving a joint thru end range of motion.
firm end feel
(stretch) ex: ankle DF, finger extension, hip medial rotation, forearm supination
hard end feel
(bone to bone) ex: elbow extension
soft end feel
(soft tissue approximation) ex: elbow flexion, knee flexion
abnormal end feel: empty
cannot reach end feel due to PAIN, ex: joint inflammation, fracture or bursitis
abnormal end feel: firm
ex: increased tone, tightening of capsule, ligament shortening
abnormal end feel: hard
ex: fracture, OA, osteophyte formation
abnormal end feel: soft
ex: edema, synovitis, ligament instability/tear
Gait: Standard - Stance Phase (60% of gait cycle)
Heel strike: instant heel touches ground to begin stance phase
standard - foot flat
point in which entire foot makes contact with ground and should occur directly after heel strike
standard - midstance
point during stance phase when entire body weight is over the stance limb
standard - heel off
point in which heel of the stance limb leaves ground
standard - toe off
point in which only toe of stance limb remains on ground
standard - swing phase (40% of gait cycle)
acceleration: begins when toe off is complete and reference limb swings until positioned directly under body
standard - midswing
point when swing limb is directly under body
standard - deceleration
begins directly after midswing as swing limb begins to extend and ends just prior to heel strike
rancho los amigos terminology
initial contact, loading response, midstance, terminal stance, pre-swing; initial swing, midswing, and terminal swing
ROM requirements for normal gait
hip flexion: 0-30, hip extension: 0-15, knee flexion: 0-60, knee extension: 0, ankle DF: 0-10, ankle PF: 0-20
Gait muscles: tibialis anterior
activity just after heel strike. eccentric lowering of foot into PF.
gait muscles: gastroc/soleus
activity during late stance phase. concentric raising of heel during toe off.
gait muscles: quads
single support during early stance phase, and just before toe off to initiate swing phase.
gait muscles: hams
activity during late swing phase. decelerating unsupported limb.
base of support
distance msrd btwn left and right foot during progression of gait. average BOS is 2-4 inches
cadence
of steps an individual will walk over a period of time. average value for an adult is 110-120 steps per minute
double support phase
refers to the two times during a gait cycle where both feet are on the ground. does not exist when running
gait cycle
sequence of motions that occur from one initial contact of the heel to the next initial contact of the same heel.
single support phase
occurs when only one foot is on the ground and occurs 2ce during a single gait cycle
step length
distance measured btwn right heel strike and left heel strike. average step length for adult is 13-16 inches