cerebral cortex Flashcards
convolutions
gyri
depressions
sulci
separates frontal from parietal
central sulcus (fissure of Rolando)
separates temporal from frontal
lateral sulcus
divides the brain into two hemispheres
median longitudinal fissure
between cuneus and precuneus
parieto occipital fissure
the parieto occipital fissure is between
cuneus and precuneus
divides occipital lobe into cuneus and lingual
calcarine fissure
the surface area of the cerebral cortex is increased by
convolutions
the cerebral cortex develops from the
pallium
2 divisions of pallium
paleo-/archipallium
neopallium
the neopallium is located b/n
hippocampus and the paleopallium
the paleopallium is located
lateral to the corpus striatum
the motor cortex contains a large amount of
pyramidal cells
sensory cortex is characterized by
granular cells
nerve cells of the cerebral cortex
- pyramidal cells
- stellate cells
- fusiform cells
- horizontal cells of cajal
- cells of martinotti
large fusiform cells =
modified pyramidal cells
smll multipolar cells present throughout the levels of the cortex
cells of martinotti
layers of the cerebral cortex
molecular external granular external pyramidal internal granular internal pyramidal multiform layer
most superficial layer
molecular layer (plexiform layer)
the molecular layer is located where
below the pia mater
the external layer contains large number of
small pyramidal cells and stellate cells
the external pyramidal layer is composed of pyramidal cells whose cell body size
increases from the superficial to the deeper borders of the layer
this layer is composed of closely packed stellate cells
internal granular layer
the internal granular layer is composed of
closely packed stellate cells
the internal granular layer has a high conc of horizontally arranged fibers known as
External band of baillarger
myelinated fibers of this layer form the ________
internal granular; stripe of Gennari
the internal pyramidal layer gives rise to
corticospinal, corticobulbar, corticostriatal
giant pyramidal cells in the motor cortex of the precentral gyrus
Betz cells
the internal pyramidal layer contains a large number of horizontally arranged fibers that form the
internal band of Baillarger
different types of cortex based on number of layers
neocortex
allocortex
aka isocortex or homogenetic cortex
neocortex
the allocortex includes
paleocortex
archicortex
paleocortex includes
olfactory cortex
archicortex includes
hippocampus and dentate gyrus