NEUR532 Quiz exam prep Flashcards
A neuroscientist is investigating how different neural circuits in the brain analyze sensory information, form perceptions of the external world, make decisions, and execute movements. At what level of analysis is this research conducted? Choose the correct option.
Select one:
A.
Molecular neuroscience level
B.
Cellular neuroscience level
C.
Systems neuroscience level
D.
Cognitive neuroscience level
C.
Systems neuroscience level
At which level of analysis do neuroscientists study the different types of neurons and their functions? Choose the correct option.
Select one:
A.
Cellular neuroscience
B.
Cognitive neuroscience
C.
Molecular neuroscience
D.
Behavioral neuroscience
A.
Cellular neuroscience
On what basis did Broca defend functional localization of the brain? Choose the correct option.
Select one:
A.
By establishing a relationship between the production of speech and the right frontal lobe
B.
By establishing a relationship between the production of speech and the occipital lobe
C.
By establishing a relationship between the production of speech and the left frontal lobe
D.
By establishing a relationship between the production of speech and the cerebellum
C.
By establishing a relationship between the production of speech and the left frontal lobe
In the above diagram of the primary vesicles of the brain, the structure labelled c corresponds to the:
Select one:
A.
prosencephalon
B.
rhombencephalon
C.
diencephalon
D.
mesencephalon
E.
myelencephalon
B.
rhombencephalon
From which layer of the embryo does the nervous system develop?
Select one:
A.
ectoderm
B.
mesoderm
C.
endoderm
D.
the nervous system develops from tissue found outside the embryo
E.
the CNS and the PNS develop from different layers of the embryo
A.
ectoderm
During brain development, which major brain structure is formed from the rhombic lips?
Select one:
A.
pons
B.
cerebellum
C.
midbrain tectum
D.
medulla oblongata
E.
cerebrum
B.
cerebellum
The “neuron doctrine” of Cajal states that:
Select one:
A.
neurons are the only cells worthy of study
B.
all the cells in the brain are neurons
C.
neurons in the CNS are all connected together to form a syncytium
D.
the neuron is the functional unit of the nervous system
E.
neurons are the only excitable cells in the body
D.
the neuron is the functional unit of the nervous system
Oligodendrocytes and Schwann cells differ in that:
Select one:
A.
oligodendrocytes are myelinating glia, whereas Schwann cells are microglia
B.
one oligodendrocyte will surround only a single axon, whereas each Schwann cell is associated with several axons
C.
oligodendrocytes are found in the central nervous system, whereas Schwann cells are found in the peripheral nervous system
D.
oligodendrocytes form nodes of Ranvier, while Schwann cells do not
E.
oligodendrocytes can divide, but Schwann cells cannot
C.
oligodendrocytes are found in the central nervous system, whereas Schwann cells are found in the peripheral nervous system
Fast axoplasmic transport:
Select one:
A.
depends on passive diffusion of substances along the axon from the cell body
B.
occurs only in the anterograde direction
C.
occurs only in the retrograde direction
D.
depends on motor proteins moving along microtubules
E.
carries substances along the axon at a maximum speed of 1 mm per day
D.
depends on motor proteins moving along microtubules
When used to stain a sample of CNS tissue, the Golgi stain:
Select one:
A.
stains only the rough endoplasmic reticulum of neurons
B.
stains all neurons completely
C.
stains a small proportion of neurons completely
D.
stains the myelin sheaths of axons only
E.
does not stain neuroglial cells
C.
stains a small proportion of neurons completely
Concerning cutaneous plexuses, which of the following is correctly matched?
Select one:
a.
The Subcutaneous plexus lies within the densely collagenous reticular layer
b.
The Papillary plexus lies immediately beneath the epidermis
c.
Dermal plexus lies in the loose connective tissue deep to the skin
d.
No answers are correct
b.
The Papillary plexus lies immediately beneath the epidermis
Neuromuscular spindles have the following characteristics except:
Select one:
a.
They are about 6 mm long, and less than 1 mm in width
b.
They may contain up to 14 intrafusal muscle fibres
c.
They are innervated by sensory neurons only
d.
They function as a receptor for stretch reflex
c.
They are innervated by sensory neurons only
The following are examples of Free nerve endings in the subcutaneous tissue and dermis except:
Select one:
a.
Peritrichial ending
b.
Merkel endings
c.
Meissner s tactile corpuscle
d.
Plexuses
c.
Meissner s tactile corpuscle
The image shown is that of a:
Select one:
a.
Peritrichial ending
b.
Merkel ending
c.
Meissner s corpuscle
d.
Ruffini ending
d.
Ruffini ending
Which of the following concerning general sensory endings is correct?
Select one:
a.
Sensory endings are special structures, which act as biological transducers, in which chemical and or physical stimuli produce action potentials in nerve endings.
b.
The three types of sensory endings are Exteroceptive endings, Medioceptive endings and proprioceptive endings.
c.
Interioceptive endings are internally located in muscles, tendons and joints where they provide data for reflex adjustment.
d.
Propioceptive endings are superficially located.
a.
Sensory endings are special structures, which act as biological transducers, in which chemical and or physical stimuli produce action potentials in nerve endings.
Concerning the Medulla Oblongata, which of the following is not TRUE?
Select one:
a.
The medulla oblongata is about 9 cm long and it widens gradually in a caudal direction.
b.
It rests on the midline part of the occipital bone and is covered dorsally by the cerebellum.
c.
The rostral limit of the medulla is marked ventrally by a prominent sulcus
d.
The dorsal surface contains the caudal half of the fourth ventricle (also known as the open part)
e.
The caudal part of the medulla is called the closed part (this contains a continuation of the central canal of the spinal cord)
a.
The medulla oblongata is about 9 cm long and it widens gradually in a caudal direction.
Concerning the white matter, which of the following is incorrect?
Select one:
a.
The dorsal funiculus (posterior column) is bounded by the midline and the dorsal gray horn.
b.
The posterior column consists of a centrally placed cuneate fasciculus.
c.
There is no anatomical demarcation between the Lateral and ventral funiculi.
d.
It consists of partially overlapping bundles of fibres
b.
The posterior column consists of a centrally placed cuneate fasciculus.
The categories of neurons/nuclei in the spinal gray matter include the following except?
Select one:
a.
Motor cells of the ventral horn
b.
The cell bodies of tract cells, whose axons constitute the ascending fasciculi of the white matter (located mainly in the dorsal horn).
c.
Interneurons (even though many of them have quite long axons)
d.
Nuclei of the Cranial Nerves
d.
Nuclei of the Cranial Nerves
Which hole provides the principal communication between the ventricular system and the subarachnoid space?
Select one:
a.
Central canal
b.
Foramen of Luschka
c.
Foramen of Magendie
d.
Spinal canal
c.
Foramen of Magendie
Which of the following is not a characteristic description of the medial division of dorsal root fibres?
Select one:
a.
They consist of unmyelinated axons, including the rapidly conducting sensory fibres.
b.
They enter the spinal white matter medial to the dorsal horn where they divide into ascending and descending branches.
c.
The descending branches run caudally within the dorsal funiculi for varying distances and eventually terminate in the dorsal horn.
d.
Many of the ascending sensory fibres in the dorsal funiculus terminate in the gracile and cuneate nuclei in the medulla.
e.
Primary sensory axons conveying signals from muscle spindles have some branches that terminate on motor neurons and are involved in the stretch reflex.
a.
They consist of unmyelinated axons, including the rapidly conducting sensory fibres.
Cerebellar cortex ridges are called:
Select one:
a.
Tonsils
b.
Folia
c.
Vermis
d.
Lobes
b.
Folia
The major output of the cerebellar cortex to the deep cerebellar nuclei arise from the:
Select one:
a.
Basket cells
b.
Purkinje cells
c.
Granule cells
d.
Golgi cells
b.
Purkinje cells
What is the role of neurons in the deep cerebellar nuclei? Choose the correct option.
Select one:
a.
Relay information from cortex to the cerebellum
b.
Relay information from the cerebellum to various brain stem structures
c.
Relay sensory information to the cerebellum
d.
Relay motor information to the cerebellum
b.
Relay information from the cerebellum to various brain stem structures
Which of the following is (are) not a major part of the cerebellum?
Select one:
a.
Tegmentum
b.
Flocculonodular lobe
c.
Vermis
d.
Lateral hemispheres
a.
Tegmentum
Which of the following structures are included in the motor loop through the cerebellum? Choose the correct option.
Select one:
a.
Sensory input through pontine nuclei to cerebellum to motor cortex through the ventral lateral nucleus of the thalamus
b.
Sensory input through the rubrospinal tract and cerebellar output through the pontine nuclei
c.
Sensory input through the ventral lateral nucleus of the thalamus and motor output through the ventral lateral nucleus of the thalamus
d.
Sensory input through the vestibulospinal tract and motor output through the rubrospinal tract
a.
Sensory input through pontine nuclei to cerebellum to motor cortex through the ventral lateral nucleus of the thalamus
Concerning the nuclei of the reticular formation, which of the following nuclei are not a member?
Select one:
a.
The precerebellar nuclei and the lateral parvocellular reticular area
b.
The raphe nulei and central group of nuclei
c.
The cholinergic and catecholinergic cell groups
d.
Nucleus tractus solitarus and Red nucleus
d.
Nucleus tractus solitarus and Red nucleus
Which of the following groups of neurons/nuclei of the reticular formation is not primarily involved in consciousness and sleep?
Select one:
a.
Noradrenergic neurons
b.
The central group of reticular nuclei
c.
Superficial medullary neurons
d.
Cholinergic neurons
c.
Superficial medullary neurons
Which of the following is NOT a characteristic description of the raphe nuclei?
Select one:
a.
They are groups of neurons either in or adjacent to the midline of the brain stem
b.
Raphe nuclei have cells with different architecture
c.
Many raphe neurons synthesize and secrete serotonin (5-hydroxytryp-tamine) as their principal synaptic transmitter.
d.
The axons of the serotonergic raphe neurons are thick, myelinated, and unbranched.
d.
The axons of the serotonergic raphe neurons are thick, myelinated, and unbranched.
Which of the following is correctly matched?
Select one:
a.
Thalamus/ Neurohypophysis
b.
Subthalamus/ Reticular Nucleus
c.
Epithalamus/ Pineal gland
d.
Hypothalamus/ Sensory fasciculi
c.
Epithalamus/ Pineal gland
What does the prosencephalon create?
- Telencephalon
- Diencephalon
What does the rhombencephalon create?
- Metencephalon
- myelincephalon
What sensory nerve is this?
Free nerve ending
What side are sensory neurons in the spinal cord usually associted with?
as the dorsal (posterior) regions
What side of the spinal cord are motor pathways usually associated with?
ventral (anterior) regions of the spinal cord
What are the 9 sensory tracts in the spinal cord?
- Dorsal Root Ganglia
- gracile fasciculus
- cuneate fasciculus
- Lateral and anterior Spinothalamic Tract
- Dorsal Spinocerebellar Tract
- Ventral Spinocerebellar Tract
- Spinoolivary-fibres
What are the 7 MOTOR nuclei in the spinal cord?
- Reticulospinal tracts (lateral medial)
- Corticospinal tracts anterior and lateral (PYRAMIDAL TRACTS)
- Olivospinal tracts
- Vestibulospinal tracts
- Tectospinal tracts
- Rubrospinal tracts
what is the dentate gyrus associated with?
- Memory
- Neurogenesis
- Spatial navigation
- Learning
- Mossy fibres
What is this image A part of?
Subiculum
Referring to the figure above, the fibres identified in A are:
the schaffer collaterals
Which is NOT one of the three recognised layers of the dentate gyrus?
Select one:
a.
Hilus
b.
Mossy fibres
c.
Granule cell layer
d.
Polymorphic layer
d.
Polymorphic layer
Which region of the hippocampus is adjacent to the subiculum?
Select one:
a.
CA2
b.
CA1
c.
dendate gyrus
d.
CA3
b.
CA1
In the spinal cord, the zone which contains both myelinated and unmyelinated fibers represents the:
Select one:
a.
Fasciculus Proprius
b.
Lateral corticospinal tract
c.
Reticulospinal tract
d.
White matter of the dorsal horn
a.
Fasciculus Proprius
Which of the following statements concerning the regional differences of the spinal cord is true?
Select one:
a.
There is decreased volume in the gray matter due to limb enlargements.
b.
The lateral horn of gray matter is characteristic of the thoracic and upper lumbar segments.
a.
There is decreased volume in the gray matter due to limb enlargements.
Damage to area V4 would most likely result in:
Select one:
a.
peripheral vision deficit
b.
total vision deficit
c.
motion perception deficit
d.
colour perception deficit
d.
colour perception deficit
If the magnocellular layers of a monkey’s LGN were bilaterally inactivated then we might expect:
Select one:
a.
The monkey would lose normal colour vision
b.
The ventral processing stream would be affected much more than the dorsal processing stream
c.
The monkey would be unable to detect motion
d.
The monkey would be unable to distinguish the shapes of objects
c.
The monkey would be unable to detect motion
What does the lateral geniculate nucleus LGN primarily do?
part of the visual pathway and receives input from the optic tract and transmits to the primary visual cortex
Efferent fibres of the dentate gyrus form the:
Select one:
a.
Perforant pathway
b.
Schaffer collaterals
c.
Mossy fibres
d.
Fornix
c.
Mossy fibres
Which of the following statements regarding gap junctions is INCORRECT?
Select one:
a.
Gap junctions consist of clusters of channels; each channel is comprised of two hexameric hemichannels
b.
Gap junctions are membrane channels that connect the cytoplasm with the extracellular fluid
c.
Gap junctions can coordinate and synchronize the electrical activity of the cells they inerconnect
d.
Gap junctions can pass net ionic current proportional to the voltage difference across the entire gap junction
e.
Gap junctions are permeable to most ions and small organic molecules
b.
Gap junctions are membrane channels that connect the cytoplasm with the extracellular fluid
Which of the following happens when a rod photoreceptor absorbs light?
Select one:
a.
The rod depolarizes because membrane Na+ channels open as a result of a decrease in the second messenger cGMP
b.
The rod hyperpolarizes because membrane K+ channels open as a result of a decrease in the second messenger cGMP
c.
The rod hyperpolarizes because membrane Na+ channels close as a result of a decrease in the second messenger cGMP
d.
The rod depolarizes because membrane K+ channels close as a result of an increase in the second messenger cGMP
e.
The rod releases glutamate due to the opening of membrane voltage gated Ca++ channels
c.
The rod hyperpolarizes because membrane Na+ channels close as a result of a decrease in the second messenger cGMP
What role do voltage-gated potassium channels play in the action potential? Choose the correct option.
Select one:
A.
Voltage-gated potassium channels maintain the resting membrane potential.
B.
Voltage-gated potassium channels help depolarize the membrane toward the threshold for an action potential.
C.
Voltage-gated potassium channels interfere with sodium conductance.
D.
Voltage-gated potassium channels restore negative membrane potential after the spike.
D.
Voltage-gated potassium channels restore negative membrane potential after the spike.
What does the sylvian fissure separate?
Temporal lobe from frontal lobe
What is this part of the brain?
Optic tracts
What are the name of these 2 ventral tracts in the medulla oblongata?
Gracile tubercle
(upper regions)
and lower regions
Gracile fasciculus
What area is this?
Olivary nuclei
What area is this?
pons
What area is this?
Basilar artery groove
What area is this?
Middle cerebellar peduncles
What area is this?
Cerebral peduncles
What area is this?
Substantia nigra
What area is this?
mamillary bodies
(posterior boundary of the hypothalamus)
What area is this?
Pituitary infundibulum
(anterior boundary of the hypothalamus)
Name 3 optic related areas in this image
- Optic nerve
- Optic chiasm
- Optic tracts
What are these nerves?
Olfactory nerves, tracts and bulbs
What area is this
Medial aspect of temporal lobe
PARAHIPPOCAMPAL GYRI
What area is this?
Uncus
Deeply in the gyri you would find the amygdaloid nucleus
What direction are each arrows?
red: rostral
Pink: caudate
What is this fissure called? and what does it separate?
Sylvian fissure
Separates Temporal lobe from frontal lobe
What sulcus is this?
Central sulcus
What is this gyri?
Precentral gyrus
(primary MOTOR cortex)
What is this gyri?
post central gyrus
(primary SENSORY cortex)
What area is this?
Frontal cortex
(Bound by central sulcus and sylvian fissure)
What area is this?
Brocas (motor speech) area
What area is this?
Wernicke’s (auditory association) area
What is this sulcus called?
Calcarine sulcus
What area is this?
Primary visual cortex
(V1)
Striate cortex
Brodmann Area 17:
What area is this?
Visual association areas (18 and 19)
What is the name of this fissure?
LONGITUDINAL FISSURE
What type of view is this?
Saggital
What direction are the coloured arrows?
- Pink: anterior (rostral)
- Blue: dorsal (caudal)
What junction is this?
The pontomedullary junction