LGN

Question 1

location of LGN in the brain using HC coordinates are:

Answer 1

A 12mm, L 9mm, depth 25mm

Question 2

primate LGN has __ layers

Answer 2

6

Question 3

magnocellular layers are:

Answer 3

1, 2

Question 4

magnocellular layers have ___ cell bodies

Answer 4

large

Question 5

P alpha are associated with what LGN layers?

Answer 5

magnocellular

Question 6

the two ventral LGN layers are the:

Answer 6

magnocellular

Question 7

the four dorsal LGN layers are the:

Answer 7

parvocellular

Question 8

parvocellular are layers:

Answer 8

3, 4, 5, and 6

Question 9

parvocellular layers are associated with ___ cell bodies

Answer 9

small

Question 10

P beta are associated with what LGN layers?

Answer 10

parvocellular

Question 11

X like cells project principally to the ___ layers

Answer 11

parvocellular

Question 12

Y like cells project to the ____ layers

Answer 12

magnocellular

Question 13

___ retinal fibers project contralaterally?

Answer 13

nasal

Question 14

nasal retina fibers terminate in layers:

Answer 14

1, 4, 6

Question 15

___ retinal fibers project ipsilaterally?

Answer 15

temporal

Question 16

temporal retina fibers terminate in layers:

Answer 16

2, 3, 5

Question 17

periphery projects to what area on the LGN?

Answer 17

front of the LGN

Question 18

lower visual field projects to what area on the LGN?

Answer 18

medial LGN

Question 19

upper visual field projects to what area on the LGN?

Answer 19

lateral LGN

Question 20

how many classes of LGN neurons are there?

Answer 20

4 basic cell types

Question 21

what LGN classes are considered relay (principal) cells?

Answer 21

class 1, 2, and 4

Question 22

what LGN class is considered interneurons?

Answer 22

class 3

Question 23

class type with the largest cell body and largest dendritic field

Answer 23

class 1

Question 24

class type where dendrites do not respect laminar borders?

Answer 24

class 1

Question 25

class type that possibly corresponds to Y cell

Answer 25

class 1

Question 26

class type with cell body and dendritic field smaller than class 1

Answer 26

class 2

Question 27

class type with dendrites that have more spines and branches than class 1

Answer 27

class 2

Question 28

class type with dendrites that do not cross laminar borders

Answer 28

class 2

Question 29

class type that are possibly X cells

Answer 29

class 2

Question 30

class type that is small with few dendritic branches

Answer 30

class 3

Question 31

class type believed to be interneurons

Answer 31

class 3

Question 32

class type with small cell body and dendritic branches

Answer 32

class 4

Question 33

class type with morphology similar to interneurons

Answer 33

class 4

Question 34

class type with dendrites parallel to laminar borders

Answer 34

class 4

Question 35

class type - possibly W cells

Answer 35

class 4

Question 36

how many types of cells are in parvocellular layers?

Answer 36

three types (I, II, and III)

Question 37

how many types of cells are in magnocellular layers?

Answer 37

two types (III, and IV)