L11 Stress

What is Physiological stress

An organisms Response to a stressor such as an environmental condition.

What is stress

A body’s method of reacting to a challenge

What are Stressors

Noxious electric stimuli that reduce the ability of young adults to perform steady contractions

Is the degree of impairment greater in young males or females

Young females

In older adults why is the Hypothalamus-Pituitary-Adrenal response to stress prolonged

Due to impairment in negative feedback

What happens in individuals when there is an increase in stress

Impairs the ability of individuals to perform steady contractions especially older adults

Step by step process of visual feedback and motor output

1. Visual Stimulus

2. Visual information processing

3. motor plan

4. motor execution

5. motor output

6. visual feedback

How do we manipulate visual load

Visual angle/gain

How does increased visual load affect the motor output

Motor output error

What is significant about motor output

Decreases with more visual information

What is important about motor output variability

Increases with more visual information in older adults

Magnification of the visual feedback increases…

Both amplitude and the speed of visual feedback

Is it the amplitude of the speed of visual feedback that increases force output variability in older adults

Increased speed but not amplitude of visual feedback increases force variability in older adults