Final Flashcards
Specificity of Learning
- what you learn depends on what you practice
- ex) practicing soccer in all weather, noisy fans, etc
“home-field advantage”
- sensory feedback is specific to certain types or locations of practice
- later performance is more successful when same sensory info is available
Learning requires…?
- changes in movement patterns in hopes that the performance becomes better
- necessary to experiment with new movements
To separate conflicting practice goals, provide both…
practice and test sessions
during practice sessions…?
- avoid repeating
- try different styles
- eliminate inappropriate patterns
- performance quality is not critical
during test sessions…?
- after several minutes of practice
- perform as well as possible using best movement pattern
learners compiling their own tests is helpful because…
- can assess own progress
- is motivating and educational
perceptual skills: research shows experts…?
tend to seek out more specific and narrowly focused info much earlier in the action than non-experts
Benefits of Practice: Attention
- performance suffers when overall demand exceeds the available attentional capacity
- reduced attention is demanded by tasks that have been well learned
Reduced Effector Competition
- trying to do two different things at the same time causes interference
- ex: patting head and rubbing tummy
Motor Program Building
- ex: gear shift; starts as several steps controlled by different motor programs
- practice causes it to become a single motor program
Benefits of Practice: Error Detection
- can point out errors and suggest corrections
- learner learns to detect and analyze errors: self-sufficiency
Fitts’ Stage One
- identify goal
- verbal/cognitive abilities
- good sense of environment
- sequencing previously learned movements
- gains in proficiency are rapid and large
- self talk (high attention demands)
Fitts’ Stage Two:Fixation
- more effective movement patterns
- motor program is built (for quick movements)
- movement produced feedback (slow movements)
- performance improves steadily
- inconsistency from trial to trial (trying new moves)
- closed skills become more stereotypic
- open skills become more adaptable
- reduce energy costs
- less self-talk
Fitts’ Stage Three: Autonomous Stage
- expert level
- high perceptual anticipation
- quick processing of environment
- programs longer movement patterns
- decreased load on attention
- no self talk
Fitts’ Stages
- heavy emphasis on perceptual-motor learning
- heavy emphasis on how cognitive processes invested in motor performance change with practice
Bernstein’s Stages
-identifies stages of learning from a combined motor control and bio mechanical perspective
Bernstein’s Stage One
- reduce degrees of freedom:
- reduce movement of unessential body parts
- focus on degrees of freedom that provide max control of basic aspects of action
Bernstein’s Stage Two
- release degrees of freedom
- release is useful for power or speed
Bernstein’s Stage Three
- exploit passive dynamics
- gravity, momentum
- movement becomes maximally skilled
Limitations of Fitts’ and Berstein’s Stages
- neither describes learning as discrete, linear stages
- progression is not categorical
- Fitts considered performance change to be regressive and progressive
- some may never acheive Fitts final stage
- some skills contradict bernstein stage 2
Absence of practice
- detrimental to performance
- forget motor skills after not practicing
long term retention depends on…?
- nature of task
- discrete tasks: forgotten quickly
- continuous tasks: retained well
warm-up decrement
- physiological factor brought on by time away from the task
- eliminated when performer performs a few trials
- important for tasks where the performer must perform very well on first attempt
Warm-Up Decrement: Set
- collection of psychological activites
- focus, postural adjustments.. etc
- reminding the body what the motion should feel like: taking a few practice swings etc
Skill Transfer
- gain or loss in ability to perform one task as a result of practice or experience in another task
- “generalization”
Motor Transfer as learning progresses
- transfer is best applied when learner is just beginning
- as learner becomes more skilled transfer should drop
is Motor Transfer big or small?
- small
- transfer that does appear is low-positive
Can you transfer basic abilities?
No
-it is better to practice the eventual goal skills rather than quickness or balance etc
Is breaking discrete skills into smaller tasks beneficial?
No,
-can cause more harm than good, disrupting essential features of the action
Quick actions are controlled by open or closed loop?
open, decisions are programmed in advance
Progressive Part Practice
- practicing pieces of movement
- beneficial if elements of movement are difficult to sequence and many in number
Through the 1980’s, it was thought that the brain consisted of…?
many specialized modules that were hardwired from birth to perform different jobs
-brain’s modules do not do their jobs in isolation
The Plastic Brain
- brain’s wiring is malleable throughout lifetime
- connections are constantly being made and updated
- brain can reorganize after damage to move functions to undamaged areas
- restricting certain senses causes brain to adapt
2 causes of Stroke (Cerebral Vascular Accident)
- ischemia
- hemmorrage
Ischemia
blockage of a cerebral vessel
-most common (80% of strokes)
Hemmorrage
rupture of a cerebral blood vessel
-blood released out of vascular space, which cuts off pathways and leads to pressure injuries
Stroke Management Acute Care
- side and cause of stroke
- preventing progression
- preventing secondary medical complications
- treating acute neurological symptoms
t-PA
- tissue plasminogen activator
- protein that helps breakdown clots
- must be given within 3-6 hours of onset of symptoms
- 1 in 3 have resolved/improved symptoms
Gains in function after stroke attributed to…?
-spontaneous recovery in brain
-response to interventions that influence neural mechanisms and adaptations
(difficult to distinguish between the two)
Neurological Impairments of Stroke
- hemiparesis/hemiplegia: mild weakness to complete paralysis of side of body opposite of CVA
- most do not regain full movement or function of upper extremity
Common impairments of stroke
- aphasia
- incontinence
- apraxia
- depression
- cognitive deficits
major factors influencing stroke recovery
-coexisting disease influences: diabetes, heart disease, obesity
time frame for stroke recovery
-most rapid in 1-3 months up to a year
a person with hemiplegia typically has….?
- decreased trunk control
- poor bilateral integration
- impaired automatic postural control