muscular units and postural distortions Flashcards
the boys ability to transfer force depends upon (3)
the neural proficiency of muscle activation
the health and efficiency of associated nones, joints, ligaments
the added support of associated muscles and fascia
if the trunk lacks stability, force transfer during ___,____,____,____ actions will be greatly reduced
throwing, running, kicking, jumping
trunk efficiency is especially critical for
energy transfer from lower to upper and upper to lower segments
the body relies on 2 muscle systems
inner and outer unit
inner unit
local stabilizers that support the spine/pelvis
outer units
myofascial sling systems; global stabilizers that work reactively to control body segments and provide functional force closure
collective group of local spinal and pelvic stabilizers
inner unit
inner unit includes which muscles
transverse abdominis, diaphragm, posterior internal oblique, pelvic floor, mutlifidus
global systems that function to stabilize the spine/pelvis during movement involving the extremities
outer units
outer units work with the inner unit to
transfer force to hands/feet across the trunk
transverse abdominis helps maintain
proper intra-abdominal pressure to manage flexion/extension of the spine
transverse abdominis enhances
rigidity of the thoracolumbar fascia to improve bracing of limbo-pelvic region
delayed firing of transverse abdominis is associated with
poor core stability and low back pain
multifidus contracts with the ___ to ___
TVA, prevent undesirable changes in spinal segment positioning
hoop tension
created between the TVA and miltifidi which connect moving segments of the vertebrae
diaphragm serves as
respiratory muscle and local stabilizer via top-down support
pelvic floor stabilizes
front and back by acting on the pelvis
pelvic floor anchors
pelvic girdle in response to bracing and loading
cooperative units of muscle and fascia designed t manage close-chain actions by producing
slings of force that transfer loads across body segments
posterior oblique sling system includes the (3)
lats, glute max, thoracolumbar fascia
posterior oblique sling system integrates with central stabilizers to form _____ between _____ and ____
a structural force transfer bridge; lumbar spine and pelvic girdle
issues with the posterior oblique sling system can impact forces that contribute to
speed, strength, power
anterior oblique sling system complimentarily opposes the _____ via the combined function of ____, ___ and ___
posterior oblique system
obliques, adductors, abdominal fascia
anterior oblique sling system creates _____ for the anterior sling and is integral to _____ plane locomotion
cross-stabilization; sagittal
deep longitudinal sling system includes the ___ and ____, ____, and _____ ligament connecting with the _____; extends to the _____
erector spinar, thoracolumbar fascia
multifidus
sacrotiberous
hamstrings
lower extremities
deep longitudinal sling system connects multiple joint segments for
efficient sprinting mechanics due to combined extension of the hip and knee
lateral sling system includes the ____,____,____ to provide ___ plane stability and aid in _____ bipedal and climbing motions
hip abductors, quadratus lumborum, thigh adductors
frontal
vertical/horizontal
lateral sling system stabilizes
hip loading for actions such as climbing a ladder and stepping up stairs
individuals with postural or muscular imbalances experience impaired
joint function and coordination between inner and outer unit
_____ can increase the risk for postural distortions, but problems usually develop over time due to ____ or ______
genetic predisposition
inactivity
chronically repeated actions/postures
many issues arise as changes in joint position case changes in biomechanics: muscles become imbalances and ____ may occur within functional units
reciprocal inhibition
example of reciprocal inhibition
inhibition of the abdominals and glutes due to excessively tight hip flexors
reciprocal inhibition
neuromuscular regulation of agonist-antagonist contraction patterns to reduce resistance during opposing joint actions
reciprocal inhibition allows
fluid movement and activation patterns
common causes of chronic postural distortions and/or muscular imbalances
poor posutre
sedentary behavior
repetitive training actions
poorly-devised exercise programs
incorrect instruction or technique
injury-related movement compensations
common postural distortions include (7)
forward head posture or rounded shoulders
winged scapulae
upper cross syndrome
kyphosis of the thoracic
lordosis of the lumbar and lower cross syndrome
undesirable fixed pelvic tilt
LE distortions
winged scapulae
lifted and outwardly-rotated scapular positions
protrude away from ribcage
winged scapulae causes
shoulder complex dysfunction and potential pain
upper cross syndrome
upper body postural distortion that presents as forward head, raised, internally-rotated or rounded/forward shoulders with an exaggerated thoracic curvature