488 - aging

Bone mass decreases after what age

35

Who has a faster loss of bone mass and why

Females due to menopause

What happens to spine

Shortens and intervertebral disks lose fluid

What happens to joints

Loss of fluid which increase friction

What is the rate of sarcopenia

0.5% loss per year from 25-50 yrs

What is the decline of the brain

Brain weight declines 10% from 30-90%

Nerve conduction velocity _____ with age

Slows

_____ of older adults do not modify their hair patterns as they age

20%

What is the main characteristic of elderly gait

Bent posture

Kinematic changes of elderly gait

-higher percentage in stance

-longer double support

-reduced angular excursions

-wider step width

-loss of arm swing

There is a _____ rate of force development at push off

30% decreased

What are speed differences in elderly and YA

YA - stride freq decreased, stride length shortens

Elderly - stride freq maintained or increased, stride length much shorter

Gait disorders in elderly

Senile gait disorder and fear of falling

What is senile gait disorder

Slow broad based shuffling and cautious pattern (reduced stride length)

*diagnosis when no underlying cause is identified

Fear of falling

Characterized by one who limits activity due to fear of falling

-decreased foot clearance during swing

-more time in double support

Wider step width