Quiz 3.2 Flashcards
Why are all the muscles positioned around the neck?
To optimize position of the senses (eyes and ears)
Muscles of shoulder for torso
Provide support and facilitate movement of the back/torso
Insertion of some shoulder muscles is back
Means extreme shoulder ROM causes torso movement
External obliques primary movement
Side bend toward same side
Rectus abdom. primary move
Flexion of lumbar spine
Internal obliques primary movement
Flex and rotate trunk to same side
Transverse ab. primary movement
Compress abdominal contents
Thoracolumbar Fascia
Deep membrane that covers back of trunk
Function of the abdominal muscles
Stabilize body and maintain upright stability
Allow wide variety of movements
Protect internal organs
Assists with breathing and speaking
Know back torso muscles
See slides
Primary function of back muscles of torso
Stabilize the back/body upright
Extend the spine/torso (sagittal plane) when flexed or to resist gravity
Posterior vs. anterior torso muscles primary movement
Posterior- extension
Anterior- Flexion
Sit ups vs. crunches
Both are Flex/extension of trunk
Sit up requires more hip flexion, upright postural muscles, primarily lower abdomen
Crunch more transverse ab, and superior abdomen
Pelvic floor
26 muscles, 3 layers
Function: Continence, support pelvic floor organs, lymph pump, support spine, pelvis, core
Provide core stability with low fatigue
Why important to have healthy back, abs, and pelvic floor
Stabilize torso during movement/standing
Transfer energy from ground to upper body
Keeps joint health of back hips and shoulders
Provide assistance with breathing
Hip bones and motion
Pelvis, femur (Sacrum?)
3 DOF: flex/ext., ab/ad, int/ext rotation
Sacroiliac joint
absorbs much of weight/force, must be very stable, many ligaments
Articulation between passenger (head trunk arms (HAT)) and locomotive
Pelvis function
Supports weight of body through spine (force transferred to bones of hip)
GRFs transitioned toward spine during locomotion, pelvis limits what goes up to spine/upper body
Site of attachment for muscles
Movements of pelvis in sagittal plane
posterior tilt (top of pelvis goes backward)
Anterior tilt (top of pelvis forward–> lordosis
Lateral pelvic tilt
Frontal plane motion around anteroposterior axis
Shoulder drops on weak side (Side with hip up)
Knee rotates in, foot everts (collapses)
Female pelvis vs. male
Less dense, wider, shallower, larger pelvic cavity, more space, more oval obturator foramina, pubic arch > 90, acetabula smaller and more anterior
Q angle
angle from medial tibial tuberosity and greater tronchonator of femur
Why do women have larger Q
Wide width of pelvis to femur ratio
Speculated cause for ACL injury in women
GRF comes vertically up leg and more is received at knee when Q is large
What change could be made to reduce women’s ACL risk
Strengthen
Make behavioral changes to have wider steps to realign GRF vector up leg and reduce knee stress
