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White matter pathways Flashcards

1
Q

Three major types of white matter pathways

A

Projection fibres
Association fibres
Commisural fibres

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2
Q

Fibres which connect higher and lower centres of the brain

A

Projection fibres

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3
Q

Fibres which connect different regions within the same hemisphere of the brain

A

Association fibres

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4
Q

Fibres which connect similar regions of opposite hemispheres

A

Commisural fibres

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5
Q

Largest bundle of fibres which connect the two cerebral hemispheres

A

Corpus callosum

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6
Q

Fibres which connect the two olfactory bulbs

A

Anterior commisure

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7
Q

Fibres which connect the two hemispheres of the midbrain

A

Posterior commisure

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8
Q

Fibres which connect the posterior dorsal thalamic nuclei

A

Hippocampal commisure

Habenular commisure

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9
Q

Most posterior part of the corpus callosum

A

Splenium

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10
Q

Features of disruption to the splenium

A

Alexia
Inability to name colours
Preserved ability to copy words

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11
Q

White matter tract that connects the hippocampus to the hypothalamus

A

Fornix

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12
Q

White matter tract that connects Broca’s and Wernicke’s areas

A

Arcuate fasciculus

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13
Q

Features of damage to the arcuate fasciculus

A

Conduction aphasia - inability to repeat words

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14
Q

Type of tract the corticospinal tract is

A

Projection

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15
Q

Function of the corticospinal tract

A

Efferent tract that connects the motor cortex to the brain stem and spinal cord

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16
Q

Type of tract the corticobulbar tract is

A

Projection

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17
Q

Function of the corticobulbar tract

A

Efferent tract that connects the cranial nerve motor centres to the brain stem and spinal cord

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18
Q

Two tracts that make up the pyramidal tracts

A

Corticospinal

Corticobulbar

19
Q

Type of tract the corona radiata is

A

Projection tract

20
Q

Function of the corona radiata

A

Connects the cortical areas to the internal capsule

21
Q

Type of tract the geniculocalcarine tract (optic radiatum) is

A

Projection

22
Q

Function of the geniculocalcarine tract

A

Connects the lateral geniculate nucleus to the primary visual cortex

23
Q

Type of tract the corpus callosum is

A

Commissural

24
Q

Type of tract the cingulum is

A

Association

25
Q

Function of the cingulum

A

Connects the frontal, parietal and temporal lobes

26
Q

Type of tract the superior occipitofrontal fasciculus is

A

Association

27
Q

Function of the superior occipitofrontal fasciculus

A

Connects the occipital and frontal lobes

28
Q

Type of tract the inferior occipitofrontal fasciculus is

A

Association

29
Q

Function of the inferior occipitofrontal fasciculus

A

Connects the occipital and frontal lobes

30
Q

Type of tract the uncinate fasciculus is

A

Association

31
Q

Function of the uncinate fasciculus

A

Connects parts of the frontal lobe to the anterior temporal lobe

32
Q

Tract which connects the frontal lobe and temporal lobe of the same hemisphere

A

Superior longitudinal/arcuate fasciculus

33
Q

Pathway which connects the cerebral cortex to the medulla oblongata and is primarily involved with motor function of the cranial nerves

A

Corticobulbar tract

34
Q

Pathway which connects the cerebral cortex to the spinal cord and is primarily involved with motor function of the limbs and trunk

A

Corticospinal tract

35
Q

Function of the dorsal column medial lemniscus pathway

A

Conveys sensations of fine touch, proprioception and vibration from the body to the brain

36
Q

Tract which originates in the red nucleus and plays a role in the tone of limb muscles and fine movements

A

Rubrospinal tract

37
Q

Tract which originates from the pons and facilitates voluntary movements

A

Medial reticulospinal tract

38
Q

Tract which originates from the medulla and inhibits voluntary movement

A

Lateral reticulospinal tract

39
Q

Tracts which originate from the vestibular nuclei and control balance and posture

A

Vestibulospinal tracts

40
Q

Tract which originates in the superior colliculus and coordinates movements in the head in response to visual stimuli

A

Tectospinal tract

41
Q

Tract which conveys the sensations of crude touch and pressure

A

Anterior spinothalamic tract

42
Q

Tract which conveys the sensations of pain and temperature

A

Lateral spinothalamic tract

43
Q

Tracts which carry unconscious proprioceptive information to the cerebellum for the control of posture and coordination of movement

A

Spinocerebellar tracts

Neurosciences (16 decks)

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