Week 2

?

1. Which of the following statements about directional tuning and population coding by primary motor cortical (PMC) neurons is correct?

  • the vector summation of population responses of PMC neurons is important for directional control of motor movements
  • he precision of directional motor movements equals the precision of directional tuning of individual PMC pyramidal cells
  • most PMC neurons have two or three distinct, preferred directions separated by intervening ranges of non-preferred directions
  • every possible direction of motion is made possible by specific populations of PMC neurons that are tuned specifically to each of the possible directions
1 of 10

Other questions in this quiz

2. Small electrical currents applied locally to the PRECENTRAL GYRUS of one hemisphere were able to evoke:

  • muscle twitches in both sides of the body
  • muscle twitches in the ipsilateral body
  • muscle twitches in the controlateral body
  • muscle relaxations in the controlateral body

3. Where does vestibular information goes first?

  • To the cortex
  • to the brain stem
  • to the spinal cord
  • To the thalamus

4. Corticospinal axons mostly:

  • synapse onto spinal γ motor neurons
  • synapse onto spinal local circuit neurons
  • send contralateral axons into the ventral (anterior) corticospinal tract
  • synapse onto spinal α motor neurons

5. The cortical motor homunculus reflects:

  • the total number of muscle fibres for particular muscle
  • the relative number of motor neurons for adjacent muscle groups
  • the relative number of motor units for each muscle groups
  • the absolute number of motor units for each motor neuron
View more questions

Comments

No comments have yet been made

Similar Biology resources:

See all Biology resources »See all Genetics resources »