Occipital and temporal lobe

Question 1

Simple features if visual information processing

Answer 1

Light intensity and wavelength

2D position in visual field

Question 2

What are complex visual representations for?

Answer 2

Perception and memory

Question 3

What information is integrated for perception and memory?

Answer 3

Form
Surface (colour/texture)
Spatial relationships
Movement
Other sensory modalities

Question 4

Do neurons in the extrastriate cortex signal global or component properties of visual scenes and objects?

Answer 4

Global

Question 5

What does perceived colour of an object depend on?

Answer 5

The wavelength reflected by the object

The wavelength reflected by the surroundings

Question 6

In which area are neurons colour sensitive?

Answer 6

V4

Question 7

What are the two visual streams?

Answer 7

Dorsal and ventral

Question 8

What is the functionality of the dorsal stream?

Answer 8

Visuo-spatial (where)

Visuo-motor (how)

Question 9

What is the functionality of the ventral stream?

Answer 9

Object analysis (what)

Question 10

Where is the dorsal stream and what reseach supports this?

Answer 10

Posterior parietal lobe

Lesions here impair object location but not object recognition

Question 11

Where is the ventral stream and what research supports this?

Answer 11

Inferior temporal lobe

Lesions here impair object recognition but not object location

Question 12

What is visual agnosia?

Answer 12

Deficits in vision without blindness

Question 13

What causes visual agnosia but intact visually guided actions?

Answer 13

Occipito-temporal brain damage

Question 14

What is optic ataxia?

Answer 14

Deficits in visually guided actions

Question 15

What causes optic ataxia?

Answer 15

Posterior-parietal lobe lesions

Question 16

Where does the inferior temporal cotex receive input from?

Answer 16

Extrastriate cortex

Question 17

What is the final stage in the visual processing hierarchy of the ventral stream?

Answer 17

Inferior temporal cortex

Question 18

Are neurons in the inferior temportal cortex general or specific?

Answer 18

Specific

Question 19

What can neurons from the inferior temporal cotex show?

Answer 19

Invariance to change in siz, orientation and other properties
Sustained activity in absense of visual object

Question 20

What are face cells?

Answer 20

Neurons that show highly selective responses to individual faces

Question 21

What is right at the end of the visual processing hierarchy?

Answer 21

Medial temporal lobe

Question 22

Which stream is information in the medial temporal lobe from?

Answer 22

It’s combined from both streams

Question 23

Where else does the medial temporal lobe recieve information?

Answer 23

Other sensory modalities

Question 24

What does the medial temporal lobe do?

Answer 24

Generates multimodal representations

Question 25

Give an example of a multimodal representation

Answer 25

Experiences (episodic) and facts (semantic) = declarative memory