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Upper Motor Neuron Control of the Brainstem and Spinal Cord

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Bachelors Degree COGS100 Quiz on Upper Motor Neuron Control of the Brainstem and Spinal Cord, created by Daniel Whiting on 16/05/2016.
Daniel Whiting
Quiz by Daniel Whiting, updated more than 1 year ago
Daniel Whiting
Created by Daniel Whiting over 10 years ago
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Resource summary

Question 1

Question
Axons in the corticobulbar tract terminate in.
Answer
  • The brainstem
  • The spinal cord
  • Extrafusal muscle fibres
  • Intrafusal muscle fibres

Question 2

Question
The relatively large cells in layer 5 of the primary motor cortex.
Answer
  • Betz cells
  • Non-Betz cells
  • Neurons
  • White matter

Question 3

Question
Axons in the corticospinal tract terminate in.
Answer
  • Intrafusal muscle fibres
  • Extrafusal muscle fibres
  • The spinal cord
  • The brainstem

Question 4

Question
Neurons in the primary cortex require very low intensity stimulation for activation and have a stimulation to muscle response delay of about...
Answer
  • 10ms
  • 1s
  • 1 microsecond
  • 30 seconds

Question 5

Question
A single upper motor neuron is thought to control.
Answer
  • A specific muscle
  • A specific movement

Question 6

Question
An upper motor neuron will fire more or less often when the direction of movement is near their prefferred direction?
Answer
  • Less
  • More

Question 7

Question
The population vector is...
Answer
  • An individual neurons preferred direction
  • The exact direction of a neurons specific direction
  • The sum of each individual neurons firing rate for a movement direction

Question 8

Question
Neurons in the pre-motor cortex are thought to fire...
Answer
  • When planning a movement
  • When performing a movement
  • After a movement
  • In response to spiders

Question 9

Question
Muscles in the face and neck are controlled by axons from the.
Answer
  • Corticobulbar tract
  • Corticospinal tract
  • Reflexive muscle fibres
  • The medial superior olive

Question 10

Question
The proximal and distal muscles are controlled by the axons from
Answer
  • The corticospinal tract
  • The corticobulbar tract
  • The medial superior olive (MSO)
  • The lateral superior olive (LSO)

Question 11

Question
Axons in the corticospinal tract have what characteristic?
Answer
  • A latency of about 70ms
  • They control facial and neck muscles
  • 90% of axons cross the midline

Question 12

Question
The muscle field is?
Answer
  • The group of muscles controlled by a given upper neuron
  • A motor unit
  • An alpha motor neuron
  • The specific muscle controlled by an upper motor neuron

Question 13

Question
Mirror neurons fire...
Answer
  • When watching a movement and while also performing the same movement
  • Only when watching a movement
  • Only when performing a movement
  • In response to non-movement stimuli

Question 14

Question
Spike triggered averaging is used to correlate muscle contractions with stimulation of upper motor neurons.
Answer
  • True
  • False

Question 15

Question
Posture stabilizing actions in secondary muscles occur in response to the primary movement...
Answer
  • Before the movement occurs
  • After the movement occurs
  • At the same time as the movement
  • Only as nessesary
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