Kinesiology Final Flashcards
Ventral Nerves Consist of _____ neurons, while the dorsal spinal root consist of ____ neurons
efferent/sensory
- dorsal (afferent sensory info comes to dorsal root)
-Ventral (efferent info leaves from sensory root)
According to research published in 2010, and discussed in class, women’s world records in sport improved faster than men’s world records until the year 1983, after which the gender performance gap stabilized at about:
10%
As presented in the video about the Australian Sports Institute’s talent identification program in women’s rowing, the Institute looked for female volunteers to train as rowers who:
had longer than average thighs and forearms
Spinal cord injury neurological level and Extent of Lesion
Incomplete Tetraplegia: all 4 extremities affected, some movement below the sight of the injury, occurs above the cervical region
Incomplete paraplegia: just legs affected occurs below cervical region (some communication)
Complete paraplegia: occurs below cervical region, no communication
Complete tetraplegia : occurs above cervical region, no communication
Which of the following consequences of spinal cord injuries is the most common?
incomplete tetraplegia
Measuring skilled performance
Error Scores:
- Absolute Error: unsigned error, no positive not negative signs add them up and divide by trials
- Constant Error: gives direction, constant error score will be positive
- Variable Error: consistency around your own average, very inconsistent this number is high
What is the constant error for the following set of scores [-8, 9, -12, -2, 4] (target score = 0)?
-1.8
What are the three sub-disciplines within the scientific field of Motor Behavior?
motor learning, motor development, motor control
Riding a mountain bicycle on an unfamiliar and winding trail is an example of:
a continuous skill
On average, peak (best) motor performance is observed between _______ and _______ years of age.
18 and 25
Gender in Motor Performance
-males tend to outperform females in gross motor tasks while females out perform males in fine motor tasks
-women improved faster than men for most of the 20th century and then gender gap stabilized in 1983
In 2007 the mandatory retirement age of pilots was increased from
60 to 65
A spinal cord injury that results in tetraplegia must have occurred in the __________ spinal region.
cervical
When attempting to identify candidates who have the abilities important for becoming successful fighter pilots, the US military (e.g., Air Force) uses a test battery. Correlation coefficients computed between the test battery score and eventual pilot performance are typically:
+ 0.3 to +0.4
Theory of General Motor Ability
Older, incorrect view in which a single, general ability was thought to underlie individual differences in motor behavior (good at skill A should be good at skill B)
In the study by Drowatzky and Zuccato (1967) which examined correlations among six balance tests, the correlation coefficients computed were very weak. The results of this experiment:
demonstrated that humans do not possess a general motor ability nor even a general balancing ability
The purpose of ______________________ is to explain how various phenomena occur.
therories
What is an Abiltiy?
stable, enduring, mainly genetically-defined trait that influences/underlies skilled performance and is not modified by practice
-abilities unlike skills are not modifiable due to practice
-abilities affect skills
- abilities that influence someone when they are a beginner aren’t the same ones that influence skills when someones an expert
Spinal nerves
C1-C8: cervical nerves they control arms and hands
T1-T12: thoracic nerves control chest and abdominal muscles
L1-L5: lumbar nerves, control leg muscles
S1-S5: sacral nerves control bowel, bladder
The spinal nerves serving the arms and hands exit/enter the spinal cord in the:
cervical region of the spine
Sensory vs. Motor Cortex
Sensory- lips bigger, has teeth while motor does not
Motor Cortex- hand bigger
T - F The primary somatosensory cortical homunculus has smaller hands than the primary motor cortical homunculus does.
True
Neuroscientist Daniel Wolpert believes that brains evolved in animals for one reason only. What is that reason?
brains evolved to allow the performance of complex and adaptable movements
Muscles are attached to bones via
tendons
T-F Muscles exert for by pulling (i.e. they do not push)
True
If you found a correlation coefficient of +.68 between performance on tasks A and B, you could conclude that tasks A and B share approximately _______ of their underlying abilities.
46%
Agonist vs. Antagonist
-Agonist: muscles that are responsible for causing a particular motion (prime mover)
-Antagonist: (muscle that performs the joint motion opposite that of agonist
Reciprocal inhibition refers to a situation when:
the antagonist muscle is inhibited while the agonist muscle contracts
-occurs for reflexive and voluntary movements
A 2012 study published in the journal Pediatrics, and discussed in class, found a correlation coefficient of _________ between IQ score and motor coordination in a sample of 460 children.
+.44
Skills that occur in an unpredictable environment are called _________________ skills.
open
A skill can be seen as a task. A skill can be classified along several different dimensions including…
- discrete: identifiable beginning and end
-serial: many discrete tasks put together, gymnastics routine
-continuous - Fine: uses smaller muscle groups primarily in hand, arm, or face
- Gross: uses large muscle groups
- Cognitive: the decision about what you do is the most important thing (chess)
- Motor: the movement is the most important thing (bench press)
Of the following choices, which is the best example of discrete and gross skill?
a vertical jump test
During rapid elbow flexion, the triceps muscle:
is inhibited and passively lengthens
T - F If you found a correlation coefficient of +.79 between hip joint flexibility (i.e., range of motion) and running speed, you would be able to conclude that hip joint flexibility affects running speed.
false
T - F Children with intellectual disability are less likely than children with average intelligence to suffer from motor coordination problems.
False
The three components of skill proficiency are:
(skill proficiency distinguishes higher-skilled performers from lower skilled performers)
Maximum certainty of goal achievement
Maximum outlay of energy
Minimum time
_________________ is a motor ability characterized by making quick choices from among a number of alternative movements (AKA: choice reaction time).
response orientation
Qualities associated with higher levels of skilled motor performance include
minimum energy expenditure and maximum certainty of goal achievement
The relative-age effect explains how __________________ can play a role in motor skill learning and performance.
birth month
Which of the following choices is the best example of a discrete skill?
clicking a mouse button
Which of the following correlation coefficients would permit the most accurate prediction of one variable simply from knowledge of the other variable?
-.87
Motor neurons send information to muscles using:
axons
The primary somatosensory and primary motor cortices are located in the _______________ and _______________ lobes of the brain, respectively.
parietal and frontal
Peripheral nerve transplants (allografts):
are effective for restoring both sensation and movement
What is correlation?
the measure of the degree of association between two variables
Correlations are used to predict
performance
- positive: one variable increases, other variable increases
-negative: one variable increases, other variable decreases
When viewing a scatterplot, how do you determine whether the correlation is strong, moderate or weak, without performing any calculations?
the closer the data points are to the trendline (i.e linear), the stronger the correlation
Parts of Brain Stem
Pons: link between cerebrum and cerebellum. Regulates sleep, respiration, swallowing, bladder control
Medulla: cardiac, respiratory, vomiting and vasomotor centers. Regulates involuntary functions such as breathing, heart rate, and blood pressure
Where are the control centers for respiration, blood pressure, and cardiac function located?
brain stem
Charlie Hince:
suffered tetraplegia as a result of his spinal cord injury. He suffered a C5 sever of the cervical spine. The brain can now not send messages to the body to move and body can not send messages back to the brain to tell what he is feeling.
Primary somatosensory cortex
primary sensory processor (feel fingers)
Function of the cerebellum
Provides smooth, coordinated body movement, important for movement coordination and learning
The cerebellum doesn’t create movement, rather it:
makes movement smooth and coordinated
T - F One would expect to find a negative correlation between reaction time (RT) and age in a large sample of persons 26 to 85 years of age.
False
Two way in which the CNS modulates active muscle force
- Motor Unit recruitment
- Size principle: motor units recruited smallest to largest - Neural stimulation Frequency (rate coding)
-Muscles fibers can be stimulated with action potentials at different frequencies. More frequent stimulation results in greater muscle force development
__________________ is one of the methods the central nervous system uses to regulate muscle force.
Motor Unit recruitment
Movement programing Stage
- Movement being planned stage of information processing
What are three lines of scientific evidence for motor programs?
- Henry and Rogers experiment
- Deafferentation Experiments: demonstrated that sensory information from a limb is not necessary for movement production
- Mechanically blocking a limb: tricep, bicep, tricep contraction the contractions are still there showing that we plan before we do the movement
Which of the following statements about the Henry-Rogers (1960) experiment is(are) true?
- the results of the experiment were seen as evidence supporting the existence of motor programs
-the experiment discovered the movement programming stage of information processing
-the experiment’s dependent variable was RT
-found that increases in movement complexity cause increase in RT
-Supports the idea that we organize (plan) movements in advance
Psychological refractory period
Delay in a person’s RT to the second of two closely spaced stimuli, compared with the RT to the second stimulus when presented alone
-Bottleneck occurs in the movement programing stage of information processing that causes this
-SOA’s between 50 and 300ms will produce refractory period, greatest delays occurs closest to 50 ms.
The psychological refractory period occurs because of a bottleneck in the stimulus identification stage of information processing.
False
The dorsal visual stream:
is the faster of the two visual streams
The complete surgical deafferentation of Dr. Berg’s left arm:
-would prevent reflexes from occurring in his left arm
-would eliminate touch and temperature sensation in his left arm
What must be eliminated to make an Open Loop system
Comparator
-purely open-loop: M1, M2, Dorsal vision
Major Components of a Closed-Loop System
Executive: makes decisions (info processing)
Effector: like a worker in a company, does the actual work
Comparator: compares actual state versus the planned or desired state (computes error)
-inserting a contact lens is an example, gives feedback
What is the primary disadvantage of a conscious closed-loop motor control system?
it is relatively slow
The capacity of a person to predict when a stimulus will be presented is called:
Temporal anticipation
The demand for attention increases between the first stage of information processing and the third stage.
True
The Wadman et al. (1979) experiment demonstrated that a 3-burst muscle activation pattern (agonist – antagonist – agonist) occurred during rapid elbow extension, even when the movement was completely blocked (prevented).
True
Which of the following is an invariant feature of generalized motor programs?
relative timing (rhythm)
Phonograph Analogy
-Record = Generalized Motor Program (pull motor program of shelf like a record)
Speed Control = Movement time parameter
Volume Control = amplitude parameter (like throwing a soft ball)
Speaker switch = effector parameter (indicate weather right or left arm throws)
Changing the speakers selected to play a song on a phonograph (stereo) system is analogous to changing the ___________________ parameter of a generalized motor program.
effector (muscle)
Ian Waterman’s illness resulted in the permanent loss of his:
movement sensation from the neck down
-he lost M1, M2, and proprioceptive feedback
The “moving room” experiments demonstrated that _________________ dominate(s) all other sources of sensory feedback for maintaining upright posture.
vision
Average human simple RT is approximately:
200ms
According to the theory of generalized motor programs, a person uses the same generalized motor program to kick a ball with the left foot as he/she uses to kick a ball with the right foot.
True
Ian Waterman:
-is dependent on vision to be able to walk
-must plan his movements in advance in order to move safely
Which of the following observations has been interpreted by some movement scientists as evidence that walking and running are controlled by different generalized motor programs?
walking and running exhibit different relative timing (rhythm)
The _________________________________ theory was developed to address the ___________________ and ____________________ problems with the original notion of motor programs.
generalized motor program / novelty / storage