L20 Structure of Major Brain Areas, Basic Sensory and Motor Pathways

Description

Know the external anatomy of the brain, and the names of the regions of the brainstem Know the internal structures of the brain and the names for collections of cell bodies and different types of white matter tracts Know the anatomy of the main motor pathway for voluntary movement (corticospinal tract) Know the anatomy of the somatosensory pathway Understand the basic function of the cerebellum in integrating sensory+motor information
Mer Scott
Quiz by Mer Scott, updated more than 1 year ago
Mer Scott
Created by Mer Scott over 7 years ago
21
1

Resource summary

Question 1

Question
Choose the correct statements about the external anatomy of the brain.
Answer
  • The central sulcus sits between the frontal and parietal lobes.
  • The parieto-occipital sulcus is anterior to the central sulcus.
  • The lateral sulcus is superior to the transverse fissure.
  • The pre-central gyrus and the post-central gyrus sit on the parietal and frontal lobes respectively.

Question 2

Question
Choose the incorrect statement about the function of the brain's lobes.
Answer
  • The parietal lobe is primarily concerned with sensory information.
  • The occipital lobe is primarily concerned with vision.
  • The temporal lobe is associated with memory and hearing.
  • The frontal lobe is primarily concerned with motor information.

Question 3

Question
The [blank_start]frontal lobe[blank_end] is split into two regions, the [blank_start]pre-frontal cortex and the motor cortex[blank_end]. The motor cortex is split into two regions: the [blank_start]primary motor[blank_end] cortex which sits on the [blank_start]pre-central[blank_end] gyrus, and the [blank_start]pre-motor[blank_end] cortex, the anterior region of the motor cortex which [blank_start]plans movement[blank_end]. Together they control [blank_start]voluntary[blank_end] somatic efferent signals. The pre-frontal cortex is involved in [blank_start]decision making, foresight, and emotion[blank_end]. [blank_start]Damage[blank_end] to it can result in a change of personality, and [blank_start]development[blank_end] of it can be altered by alcohol. It is abnormalities in this area which can cause personality altering mental illnesses such as [blank_start]schizophrenia[blank_end].
Answer
  • frontal lobe
  • pre-frontal cortex and the motor cortex
  • primary motor
  • pre-central
  • post-central
  • pre-motor
  • voluntary
  • involuntary
  • plans movement
  • decision making, foresight, and emotion
  • Damage
  • development
  • schizophrenia

Question 4

Question
The diencephalon consists only of the thalamus and hypothalamus.
Answer
  • True
  • False

Question 5

Question
The corpus callosum sits anterior to the thalamus/diencephalon.
Answer
  • True
  • False

Question 6

Question
The regions of the brainstem, from most superior to most inferior, are:
Answer
  • Pons, midbrain, medulla oblongata
  • Midbrain, pons, medulla oblongata
  • Medulla oblongata, midbrain, pons

Question 7

Question
The cerebral cortex (white matter) is superficial to grey matter of the brain.
Answer
  • True
  • False

Question 8

Question
Choose the correct statements about the internal anatomy of the brain.
Answer
  • Deep collections of cell bodies (grey matter) are called deep nuclei.
  • The 3 types of white matter are differentiated by orientation.
  • The commissural tracts join the cerebral hemispheres. E.g. The corpus callosum
  • The corticospinal tract is an association tract.
  • Projection tracts are communication pathways between regions of the same side of a cerebral hemisphere e.g. pre-motor and motor cortex pathway

Question 9

Question
The primary motor cortex sits on the pre-central gyrus, and it's neurons have no specific organisation.
Answer
  • True
  • False

Question 10

Question
Which statement about the corticospinal tract is false?
Answer
  • It is a projection tract
  • It contains efferent neuron cell bodies
  • Most of its fibres cross over to the opposite side of the body in the medulla oblongata
  • Axons synapse in the dorsal horn of the spinal cord

Question 11

Question
Choose the incorrect statement about the somatosensory pathway
Answer
  • The 'relay' neuron between the spinal cord and the thalamus resides in the medulla oblongata
  • The flow of information crosses over to the opposite side when passing through the relay neuron, before ascending to the thalamus
  • There is another synapse between the neuron from the thalamus and somatosensory cortex (in the parietal lobe)
  • The mapping of the somatosensory cortex is the opposite to that of the motor cortex.

Question 12

Question
The neurons in the somatosensory cortex have very short, or no axons, while the neurons in the motor cortex have relatively longer axons.
Answer
  • True
  • False

Question 13

Question
The cerebellum [blank_start]integrates[blank_end] motor and sensory systems, [blank_start]coordinating[blank_end] movement guided by sensory feedback. Firstly, the [blank_start]motor[blank_end] cortex initiates an AP for movement. This is copied/relayed to the [blank_start]cerebellum[blank_end]. Next, [blank_start]sensory[blank_end] information about the movement goes to the cerebellum. The cerebellum [blank_start]compares[blank_end] these sets of information, and [blank_start]adjusts[blank_end] the motor output (coordination).
Answer
  • integrates
  • coordinating
  • motor
  • cerebellum
  • sensory
  • compares
  • adjusts

Question 14

Question
Choose the incorrect statement about the basal ganglia
Answer
  • There are 5 types of basal ganglia (groups of cell bodies in the brain)
  • The substantia nigra are the basal ganglia which cause Parkinson's disease when they fail to function
  • The basal ganglia are part of a circuit in a brain and their role is to select an appropriate movement
  • The basal ganglia are not involved in initiation or termination of movement
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