Cells recorded from the same electrode have receptive fields in the same part of the visual field.
1 of 19
"Systematic mapping between areas of the visual field and areas of the cortex/other brain regions"...?
Retinotopy
2 of 19
What did original studies of retinotopy rely on?
Lesions
3 of 19
What is tonotopic mapping?
An orderly mapping between frequency tuning and position in primary auditory cortex
4 of 19
What is somatotopy?
Adjacent body parts are represented near to one another and the whole body is represented in a single ***** running parallel to and behind the central sulcus
5 of 19
When Penfield induced muscle contractions via stimulation the motor cortex, where was this motor map found?
Infront of the central sulcus
6 of 19
Are maps only restricted to primary cortices?
No, they are just harder to find as neurons past the cortex dont respond to simple/motor variables. Their responses can be hard to pinpoint
7 of 19
What is cortical magnification?
More sophisticated processing requires greater allocation of cortical space
8 of 19
If there are denser arrays of neurons in a region of the sensory cortices...?
They have larger cortical representations
9 of 19
If there are denser arrays of neurons in a region of the motor cortices...?
They have a higher capability of exercising fine motor control
10 of 19
In the somatosensory cortex...?
Body parts which are more densly arrayed with receptors e.g hands are afforded more space than less sensitive regions e.g shoulder
11 of 19
In the motor cortex...?
Effectors which are subject to fine motor control e.g tongue, lips, hands, are allocated more space in the cortical map
12 of 19
Can maps adjust to change?
Yes, depending on experience
13 of 19
What are lateral connections assumed to have?
Centre-on, surround-off
14 of 19
What doe the properties of lateral connections afford?
Physically close neurons facilitate each other, distant neurons inhibit
15 of 19
What is meant by a self organising map?
After weight updating from competitive learning, neighboruing neurons also update. The physical layout of the network affects learning
16 of 19
Physically adjacent units to the winning updating cells...?
Come to represent similar input patterns
17 of 19
Neurons tunings are spread...?
Evenly across the space of the input
18 of 19
Which are accorded more space in the map?
Similar input patterns that occur frequently
19 of 19
Other cards in this set
Card 2
Front
"Systematic mapping between areas of the visual field and areas of the cortex/other brain regions"...?
Comments
No comments have yet been made