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Comparative Neuroanatomy
Exam 3
40
Biology
Undergraduate 2
03/18/2015

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Term
invertebrate
Definition
no back bone
Term
structure of nerve net
Definition
interconnected neurons (no brain, ganglia, or cephalization)
Term
what kinds of organisms have a nerve net?
Definition
those with radial symmetry (cnidaria, ctenophora)
Term
how are neurons placed in nerve net? (close together, far apart)
Definition
spread apart
Term
nerve nets can...
Definition
detect food/chemicals in a rudimentary way, help animal move through environment
Term
nerve nets can't...
Definition
determine source of stimulus input (produce same motor output throughout entire body when any part is "touched")
Term
flatworms (planaria) have what kind of symmetry?
Definition
bilateral
Term
worm like animals: nerve cords
Definition
dual nerve cords running along entire body, cords connected by transverse nerves
Term
worm like animals: simple brain
Definition
two ganglia at head end
Term
worm like animals: sensory info
Definition
obtained through photoreceptors on eyespots, other sensory organs detect chemical info
Term
planarians specialty
Definition
can display distinct behavioral responses based on type of signals
Term
C. elegans: nervous system structure and making
Definition
simple, 302 neurons, 7,000 synapses
Term
C. elegans: cells
Definition
each one different in every organism
Term
C. elegans: apoptosis
Definition
genes that control programmed cell death (apoptosis) first found in C. elegans
Term
organisms with centralized nervous systems
Definition
arthropods, mollusks
Term
arthropod: nervous system structure
Definition
several large paired ganglia in head region
Term
arthropod: mushroom bodies - what organism?
Definition
fruit fly
Term
arthropod: mushroom bodies - function
Definition
leaning and memory (smell), coincidence detector (associate two things)
Term
vertebrates who only have simple cognition...
Definition
have smaller forebrain, bigger hindbrain
Term
vertebrates who have high cognition...
Definition
have bigger forebrain
Term
basic vertebrate nervous system: forebrain
Definition
telencephalon (like amygdala/hippocampus), diencephalon (like thalamus/hypothalamus)
Term
basic vertebrate nervous system: midbrain
Definition
tectum (sensorimotor processing/spatial orientation), cerebellum
Term
basic vertebrate nervous system: hindbrain
Definition
cranial nerves
Term
main parts of basic vertebrate nervous system
Definition
forebrain, midbrain, hindbrain, spinal cord
Term
parts of cortex
Definition
allocortex, neocortex
Term
allocortex
Definition
- older cortex in birds/reptiles/some parts of mammalian brains (puriform cortex)
- only has 3 layers
Term
neocortex
Definition
- 6 layered
- only in mammal brains
- takes up 90% of human cerebral cortex
Term
homologous structures
Definition
same origin (embryonic/phylogenetic)
Term
analogous structures
Definition
- same function, different origin
- example of convergent evolution
Term
homologous cortical regions: prelimbic cortex in rodents is functionally homologous to...
Definition
dorsal anterior cingulate cortex (broadmann area 25)
Term
homologous cortical regions: prelimbic cortex/dorsal anterior cingulate cortex - function
Definition
role in cognitive processes
Term
homologous cortical regions: infralimbic cortex in rodents is functionally homologous to...
Definition
orbitomedial prefrontal cortex (broadmann area 25)
Term
homologous cortical regions: infralimbic cortex/orbitomedial prefrontal cortex - function
Definition
viseral/autonomic functions (changes in blood pressure, changes in respiration, heart rate change, digestion change)
Term
sensory organ convergence - function
Definition
angular acceleration
Term
angular acceleration - organs
Definition
semi-circular canal systems of human and crab
Term
specialized areas in humans
Definition
wernicke's and broca's areas
Term
specialized area in rodents
Definition
barrel cortex
Term
where are whisker barrels found?
Definition
somatosensory cortex of rodents
Term
information flow of barrel cortex
Definition
1. whiskers send sensory info to primary somatosensory cortex (S1) via brainstem/thalamus
2. barrel cortex signals to motor cortex (M1)
3. whisker movements are regulated by the M1 signals
Term
layout of barrel cortex
Definition
each whisker is connected to a part of the barrel cortex
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