Lab 2 Flashcards
What is Lab 2 About?
Sensory and Motor system integration
Nervous System Integration
The generation of a motor output based on the sum of the sensory inputs.
How is much of the integration done within the nervous system?
Through reflex arcs
what reflex does not require the brain?
The Patellar reflex
Why is it that animals with larger brains can learn more quickly?
They have more inter neurons and neuronal connections.
Reaction time:
Start of a signal to the response
What factors influence reaction time
- ) Signal complexity
- ) strength
- )duration
Three ways in which the sensory system stimulated affects reaction time:
- ) There are differences in afferent conduction times between sensory systems.
- ) Some sensory systems can change instantly while others change more slowly.
- ) Certain sensory systems are more sensitive.
Visual Motor Learning
Increasing the accuracy, speed and coordination of tasks involving hand-eye coordination the more often you perform them.
Calculation for Standard error of the mean
SEM= STDEV/SQRTn
Can you calculate a standared error for the students?
no
What does the SEM mean?
quantifies how much the reaction times vary among the students
A 95% confidence interval represents…
the range of values that you can expect to contain the true mean of the population.
What does a smaller SEM mean?
A smaller SEM signifies a smaller amount of variation in the population as a whole.
What does it mean if your data lies within the 95% CI calculated for the class data?
Your data will not likely be statisitically different from the population as a whole.
How does the beer goggles shift the visual environement?
Horizontal direction
The amount that light is bent is based on the index of refraction of the materials used through which the light passes.
What are the major differences between a reaction and a reflex?
A reaction: sensory nerves carry the info to the brain which perceives and then sends message to the motor nerves to respond to the stimulus in a particular manner.
A reflex: Sensory nerves are still involved, they carry the message only up to the CNS and then quickly back to the motor nerves. By passes the brain
More complex reflexes usually involve…
additional interneurons nd more than one population of motor neurons
