Ch. 22 Musculoskeletal Flashcards
What shape is an infants spine at birth
At birth, the spine has a single C curve.
By what age does the infant spine fully develop all curves
By 18 months
What type of foods help prevent obesity and promote bone mass accrual in children
Dark greens, deep yellow vegetables, low in fried foods.
By what age gestation has a fetus formed a scale model of the skeleton
3 months gestation
Of what is the fetus skeleton made initially
cartilage
From where does bone lengthening occur in infants
epiphyses, or growth plates
At what age is the last closure of the epiphyses in children/adolescents
by age 20
at what point in development is growth markedly increased
adolescent growth spurt
what leads to increased mobility in joints during pregnancy
increased hormone levels
What is the result of increased joint mobility in pregnancy
noticeable changes in posture
What is lordosis
compensation for the fetus by shifting weight farther back on the lower extremities. This shift in balance creates back strain, which is why some woman experience back pain during pregnancy.
What are other postural changes that occur during pregnancy
anterior flexion of the neck and slumping of the shoulder girdle compensate for lordosis.
Upper back changes may put pressure on the ulnar and median nerves during 3d trimester.
Nerve pressure leads to aching, numbness, weakness in UE of woman.
What is remodeling (in context of of aging adult musculature)
cyclic process of bone reabsorption and deposition
By what age does bone mass peak
25 - 35 y.o.
At what does loss of bone matrix start to occur more rapidly.
40 y.o.
What is the definition of osteoporosis
gradual loss of bone density
At what age does osteoporosis become more prominent in women and why
5 years after menopause (due to lack of estrogen leading to accelerated bone loss).
At what age does decrease in height predominately occur and why
most sign. after 60; greater decrease occurs in 70-80’s as a result of osteoporotic collapse of vertebrae.
What are some postural changes that occur in the aging adult?
kyphosis, backward head tilt to compensate for kyphosis, slight flexion of hips/knees, loss of subq fat, Loss of fat in face and deposits of fat in abdomen and hips.
What is the result of loss of subq. fat in the aged adult?
leaves bony prominences more marked, absolute loss of muscle mass occurs, some decrease in size, and some atrophy, producing weakness.