Subcortical Fibre Tracts Flashcards Preview

Neuroanatomy > Subcortical Fibre Tracts > Flashcards

Flashcards in Subcortical Fibre Tracts Deck (51)
Loading flashcards...
1

Boundaries of frontal lobe

Dorsolateral surface: Central sulcus (posterior) and lateral/Sylvian fissure (inferior) Medial surface: corpus callosum (inferior) to central sulcus

2

Boundaries of parietal lobe

Dosolateral surface: Anterior = central sulcus; Inferior = lateral sulcus; Posterior = upper half of arbitrary line connecting parieto-occipital sulcus to the pre-occipital notch Medial: Frontal lobe = anterior boundary; Parieto-occipital sulcus and corpus callosum = posterior and inferior boundaries

3

Boundaries of temporal lobe

On lateral surface: Superior boundary = lateral sulcus and its posterior projection, Posterior boundary = lower portion of arbitrary line connecting the parieto-occipital sulcus and the pre-occipital notch 2. On medial surface•Posterior boundary: imaginary line joining the pre-occipital notch andt he anterior end of the calcarine sulcus

4

Occipital lobe boundaries

1. On lateral surface•Anterior boundary = line joining the parieto-occipital sulcus and the pre-occipital notch On the medial surface:Anterior boundary = the posterior borders of the parietal and temporal lobes

5

Which structures are found in limbic lobe?

1) cingulate gyrus; 2) parahippocampal gyrus 3) hippocampal formation

6

What is the isthmus

Strip of cortex connecting parahippocampal gyrus to the cingulate gyrus

7

What is BA4

Primary motor area -precentral gyrus, presntral sulcus, central sulcus)

8

What is BA 6

premotor or motor association area

9

What is inferior part of BA 8

Frontal eye field - cortical control of gaze

10

What are BAs 3,1,2 involved in

Primary somatosensory cortex (post-central gyrus)

11

What are BAs 5,7, and 40 involved in?

Somatosensory association area -- superior parietal lobules extending to medial surface

12

What are BAs 41 and 42 involved in?

Primary association area; superior surgface of superior temporal gyrus; Heschl's gyrus

13

BA 22 is involved in which sensation?

Audtion; secondary auditory cortex

14

Which primary area is contained within BA 17?

Visual - in walls of calcarine fissure extending onto lateral surface

15

Which BAs make up the visual association area?

BA 18 and BA 19

16

Which BA is involved in taste?

BA 43

17

Where is taste information integrated with olfactory info?

Orbital cortex of frontal lobe and amygdala

18

Which BAs are involved in Broca's Area?

44 and 45; inferior frontal/angular gyrus (usually left hemisphere)

19

Which BAs are involved in Wernicke's areas?

22 (superior temporal gyrus) and regions 39 and 40 around the end of the lateral sulcus into the parietal lobe

20

Which fibre tract connects broca's and wernicke's

Arcuate fasciculus

21

Which region is damaged in patients who have difficulty repeating words (conduction aphasia)

Arcuate fasciculus

22

Which region is damaged in patients who have difficulty producing individual words, syntax, grammar

Broca's

23

Which region is damaged in patients who cannot comprehend speech and produce non-sensical wordcs

Wernicke's

24

Which region is characterized by BAs 9, 10, 11, and 12?

Frontal association - connected w/ DM thalamus

25

Where do fibres from the upper visual field travel after reaching the lateral geniculate nucleus?

Lower bank of calcarine sulcus (V1)/BA17

26

Where do fibres from the lower visual field travel after reaching the lateral geniculate nucleus?

Upper bank of calcarine sulcus (V1/BA17)

27

Where are the frontal eye fields

28

What lies posterior to the frontal eye field

Motor-hand area

29

Which thalamic nucleus does auditory info from cochlea project to?

 Medial geniculate nucleus

30

What is heschl's gyrus

Contains A1; located transversely within lateral sulcus