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Flashcards in Cerebral Cortex + imaging techniques Deck (39):
0

What techniques of imaging are functional?

PET and fMRI

1

How many layers does neocortex have?

6

2

The hippocampus has ___ cortical layers?

4

3

Which layers contain pyramidal cells?

III, V, IV

4

Which layers project to other cortical areas?

II + III

5

Which layer receives large thalamic input?

What type of cells does it have?

IV

Stellate

(Areas thy receive sensory info have wide layer 4)

6

What are the cells of layer V?

What do these cells project to?

Large pyramidal

Subcortical structures

(Wide lamina 5 if area send out motor info)

7

Layer VI projects to the___?

Thalamus

8

What are Brodman area of somatosensory sensation?

3, 1, 2

9

Visual Brodman areas?

17, 18

10

Brodmans areas for audition?

41, 42

11

Brodmans areas for speech production?

44, 45

12

Are basket cells cells excitatory or inhibitory?

Inhibitory

13

What are ablation studies?

Remove part of brain and observe behaviour

14

What is the concept where bumps on skull reflect mental faculties and characteristics?

Phrenology

15

What die an EEG measure?

Electrical activity of large group/ population of neurones

16

What waves are seen in deep sleep and have a frequency of <4Hz?

DELTA


(Large amplitude)

17

In what state are THETA waves seen and what frequency are they at?

Sleep

4-7Hz

18

What waves are seen if an individual is awake and relaxed?

ALPHA

8-13Hz

19

What waves are seen in mental activity?

What frequency?

BETA

13-30 Hz

High frequency, low amplitude

20

What do non-functioning imaging detect?

Structural changes, tumours etc

21

What type of imaging use strong magnetic fields and radio waves?

MRI

22

MRI images are produced based on the ____ content of tissues?

Hydrogen (water)

23

What do PET and fMRI scans detect?

Changes in brain metabolism and blood flow;
- active cells use more O2 and glucose ---> increased blood flow
- radioactive dye

24

The association cortex makes up ___% of the cortex?

75%

25

What is the main input to the association cortex?

Cortico-cortical connections

26

Role of association cortex?

Cognition
(Integrates info)

27

The PARIETAL association cortex is responsible for?

ATTENTION

28

The FRONTAL association cortex is responsible for?

Planning

29

The TEMPORAL association cortex is responsible for?

Recognition

30

What is the condition where the individual cannot attend to stimuli on one side of the body (opposite side to lesion)?

Contralateral neglect sydrome

(Damage to parietal association cortex)

31

What condition arises from damage to temporal association cortex and results in inability to recognise faces?

Prosopagnosia

32

Speech areas are found in which hemisphere?

Left

(Lateralisation)

33

What is aphasia?

Damage to speech areas- inability to produce or understand language

34

Which association cortex is Broca's area in?

Frontal

35

What association cortex is Wenicke's area in?

Temporal

36

What is Broca's aphasia?

Inability to produce language efficiently
Halting, disordered and repetitive speech

37

What is Wernicke's aphasia?

Fluent speech but makes little sense
Inappropriate words

38

Do speech areas overlap and are they strongly localised in early or late bilingualism?

Early