The Brain

Question 1

1. The cerebral cortex primarily consists of:
   A. White matter and axons
   B. Grey matter containing neuron cell bodies
   C. Cerebrospinal fluid
   D. Projection fibres

Answer 1

B

Question 2

Which lobes make up the cerebral cortex?
A. Frontal, temporal, parietal, occipital
B. Frontal, cerebellar, brainstem, temporal
C. Parietal, occipital, cerebellar, temporal
D. Frontal, parietal, limbic, brainstem

Answer 2

A

Question 3

The cerebrum is best described as:
A. The smallest part of the brain responsible for reflexes
B. Responsible only for sensory processing
C. The largest part of the brain involved in perception to action
D. A relay station for sensory information

Answer 3

C

Question 4

The premotor cortex is primarily responsible for:
A. Initiating muscle contraction
B. Coordination of learned movements
C. Sensory perception
D. Emotional processing

Answer 4

B

Question 5

Movements controlled by the premotor cortex are typically:
A. Internally triggered
B. Reflexive
C. Activated by external stimuli
D. Involuntary

Answer 5

C

Question 6

The supplementary motor area (SMA) differs from the premotor cortex because it:
A. Controls reflexes
B. Responds mainly to external cues
C. Initiates movements from internal stimuli
D. Does not project to the spinal cord

Answer 6

C

Question 7

Proprioception provides information about:
A. Pain and temperature
B. Visual perception
C. Limb position relative to the body
D. Muscle strength

Answer 7

C

Question 8

The primary somatosensory cortex is located in the:
A. Frontal lobe
B. Temporal lobe
C. Anterior parietal lobe
D. Occipital lobe

Answer 8

C

Question 9

Which modality is NOT processed by the somatosensory cortex?
A. Touch
B. Pain
C. Vision
D. Temperature

Answer 9

C

Question 10

The anterior association area is most involved in:
A. Visual interpretation
B. Memory, planning and behaviour
C. Balance and posture
D. Auditory processing

Answer 10

B

Question 11

The limbic association area is most strongly associated with:
A. Motor coordination
B. Sensory discrimination
C. Memory and emotion
D. Language comprehension

Answer 11

C

Question 12

Damage to the cerebellum most commonly results in:
A. Paralysis
B. Ataxia
C. Aphasia
D. Loss of sensation

Answer 12

B

Question 13

The cerebellum refines movement by:
A. Initiating motor commands
B. Comparing motor plans with proprioceptive input
C. Suppressing unwanted movement
D. Generating voluntary movement

Answer 13

B

Question 14

A key function of the basal ganglia is to:
A. Initiate reflexes
B. Relay sensory information
C. Select appropriate movements and inhibit others
D. Produce CSF

Answer 14

C

Question 15

Parkinson’s disease symptoms are primarily due to:
A. Excess dopamine release
B. Damage to the cerebellum
C. Reduced dopamine from substantia nigra
D. Thalamic lesions

Answer 15

C

Question 16

The thalamus functions primarily as a:
A. Motor execution centre
B. Sensory and motor relay station
C. Memory storage area
D. Balance controller

Answer 16

B

Question 17

Thalamic dysfunction can affect:
A. Only sensation
B. Only movement
C. Both sensory perception and motor control
D. Only cognition

Answer 17

C

Question 18

Which structure is NOT part of the brainstem?
A. Midbrain
B. Pons
C. Medulla oblongata
D. Cerebellum

Answer 18

D

Question 19

Damage to the brainstem is often catastrophic because it controls:
A. Voluntary movement only
B. Language processing
C. Vital autonomic functions
D. Memory storage

Answer 19

C

Question 20

Broca’s area is primarily responsible for:
A. Understanding spoken language
B. Speech production
C. Visual recognition
D. Memory formation

Answer 20

B

Question 21

Damage to Wernicke’s area typically results in:
A. Inability to speak
B. Slurred speech
C. Fluent but meaningless speech
D. Loss of hearing

Answer 21

C

Question 22

The prefrontal cortex is crucial for:
A. Balance
B. Predicting consequences of actions
C. Reflex control
D. Visual processing

Answer 22

B

Question 23

The prefrontal cortex typically fully matures:
A. At birth
B. In early childhood
C. In adolescence
D. In the early 20s

Answer 23

D

Question 24

In most people, language is primarily located in the:
A. Right hemisphere
B. Left hemisphere
C. Cerebellum
D. Brainstem

Answer 24

B

Question 25

The right hemisphere is particularly important for: A. Mathematical calculations B. Logical reasoning C. Face recognition and spatial awareness D. Speech production

Answer 25

C

Question 26

The tectospinal tract originates from the: A. Inferior colliculus B. Superior colliculus C. Red nucleus D. Vestibular nuclei

Answer 26

B

Question 27

Axons of the tectospinal tract: A. Descend ipsilaterally B. Cross at the spinal cord C. Cross immediately in the midbrain D. Do not decussate

Answer 27

C

Question 28

Medial motor tracts primarily innervate muscles responsible for: A. Fine finger movements B. Fractionated movements C. Posture and gross movements D. Facial expression

Answer 28

C

Question 29

Lateral motor tracts are most important for: A. Automatic postural adjustments B. Head and neck reflexes C. Fractionated distal limb movements D. Emotional motor responses

Answer 29

C

Question 30

Which tract is MOST important for voluntary, fractionated movement? A. Rubrospinal B. Medial corticospinal C. Lateral corticospinal D. Reticulospinal

Answer 30

C

Question 31

The reticulospinal tract originates in the: A. Cerebellum B. Reticular formation C. Red nucleus D. Superior colliculus

Answer 31

B

Question 32

A key role of the reticulospinal tract is: A. Fine finger movement B. Reflexive eye movements C. Anticipatory postural adjustments D. Speech production

Answer 32

C

Question 33

The medial vestibulospinal tract primarily affects: A. Lower limb extensors B. Neck and upper back muscles C. Distal hand muscles D. Facial muscles

Answer 33

B

Question 34

The lateral vestibulospinal tract: A. Inhibits extensors B. Facilitates ipsilateral extensors and inhibits flexors C. Projects bilaterally D. Controls voluntary movement

Answer 34

B

Question 35

The rubrospinal tract originates in the: A. Pons B. Red nucleus C. Motor cortex D. Cerebellum

Answer 35

B

Question 36

The rubrospinal tract mainly influences: A. Trunk muscles B. Lower limb extensors C. Distal upper limb muscles D. Facial muscles

Answer 36

C

Question 37

Approximately what percentage of lateral corticospinal fibres decussate in the pyramids? A. 50% B. 65% C. 85–90% D. 100%

Answer 37

C

Question 38

The pyramidal decussation occurs at the level of the: A. Pons B. Midbrain C. Medulla–spinal cord junction D. Internal capsule

Answer 38

C

Question 39

The raphespinal tract releases: A. Dopamine B. Acetylcholine C. Serotonin D. Noradrenaline

Answer 39

C

Question 40

Ceruleospinal tract activity is associated with: A. Precise voluntary movement B. Emotional states and anxiety C. Sensory discrimination D. Language production

Answer 40

B

Question 41

The primary motor cortex is located in the: A. Postcentral gyrus B. Precentral gyrus C. Parietal lobe D. Temporal lobe

Answer 41

B

Question 42

Which cortical area is most active before internally generated, sequential movements? A. Primary motor cortex B. Premotor cortex C. Supplementary motor area D. Somatosensory cortex

Answer 42

C

Question 43

The motor homunculus represents: A. Body size proportional to muscle mass B. Equal cortical representation of all muscles C. Cortical area proportional to motor unit density D. Only voluntary movement patterns

Answer 43

C

Question 44

Damage to the internal capsule most commonly results in: A. Isolated sensory loss B. Hemiplegia C. Ataxia D. Aphasia only

Answer 44

B

Question 45

Corticobulbar fibres pass through which part of the internal capsule? A. Anterior limb B. Posterior limb C. Genu D. Retrolenticular limb

Answer 45

C

Question 46

The basal nuclei primarily influence movement by: A. Directly innervating LMNs B. Modifying UMN activity C. Generating reflexes D. Producing muscle contraction

Answer 46

B

Question 47

Parkinson’s disease is associated with: A. Excess inhibition of basal nuclei output B. Increased dopamine release C. Increased activity of excitatory basal nuclei neurons D. Cerebellar degeneration

Answer 47

C

Question 48

The cerebellum refines movement by: A. Initiating voluntary motor commands B. Comparing intended and actual movement C. Activating alpha motor neurons D. Suppressing sensory input

Answer 48

B

Question 49

CSF is primarily produced by the: A. Arachnoid villi B. Pia mater C. Choroid plexus D. Dural sinuses

Answer 49

C

Question 50

CSF flows from the third to the fourth ventricle via the: A. Foramen of Monro B. Foramen of Magendie C. Cerebral aqueduct D. Lateral foramina

Answer 50

C

Question 51

Subarachnoid space lies between the: A. Dura and skull B. Dura and arachnoid C. Arachnoid and pia D. Pia and brain

Answer 51

C

Question 52

Epidural haematomas are usually caused by: A. Venous bleeding B. Arterial bleeding C. CSF blockage D. Infection

Answer 52

B

Question 53

Communicating hydrocephalus occurs when: A. Cerebral aqueduct is blocked B. Ventricular system is intact but CSF absorption is impaired C. Choroid plexus overproduces CSF D. Lateral ventricles collapse

Answer 53

B

Question 54

ALS affects: A. Only upper motor neurons B. Only lower motor neurons C. Both upper and lower motor neurons D. Sensory neurons

Answer 54

C