Intro Flashcards
outside layer
ectoderm
middle layer
mesoderm
inner layer
endoderm
ectoderm folds and creates what?
lumen
cluster of neurons outside the nervous system
ganglia
nerve cells that carries messages between the brain and the body; they look like shooting stars
neurons
cluster of neurons inside
nucleus
means young or immature
blast
tail of nerve
axon
connects one neuron to another
interneuron
sexual reproduction
mitosis
union of cells
fertilization
covers the neural tube and has no myelin covering; gray matter
mantle zone
inner layer that has a myelin covering; white matter
axonal marginal layer
finds its appropriate target in the periphery and central nervous system
growth cone
forms the central canal of the fully developed spinal cord
neural canal
process by which the number of cells in a developing embryo is multiplied through cell division
cell cleavage
cartilaginous skeletal rod supporting the body in all embryonic and some adult chordate animals
notochord
key developmental structure that serves as the basis for the nervous system
neural plate/neural groove
- enclosed ectoderm fold
- hollow structure from which the brain and spinal cord form
- surrounds the neural canal
neural tube
gives rise to a diverse cell lineage
group of cells isolated by the process of neural tube fusion
neural crest
other names for dorsal root ganglia
spinal ganglion
posterior root ganglion
cluster of nerve cell bodies in a posterior root of a spinal nerve
dorsal root ganglia
contain the sensory cell bodies which send their developing acons into the evolving spinal cord and skin
dorsal root ganglia
dividing cell that will develop into a neuron often after a migration phase
neuroblast
ependymal layer
neuroblast
create the dorsal and ventral horns of the spinal cord
alar and basal plates
neural structure in the embryonic nervous system
Alar plate
other name for alar plate
alar lamina
becomes the sensory axon part of the spinal cord
caudal part
region of the neural tube ventral to the sulculus limitans
basal plate
develop at their interface in the throracic and upper lumbar cord
visceral efferent neurones
relies on factors secreted dorsally ar ventrally from notochord
dorsal ventral patterning
predominantly found in the dentate gyrus of hippocampus
neural progenitor cells
failure of fusion of the anterior rostral neuropore
anencephaly
any defect at the lower end of the vertebral column and spinal cord
spina bifida
most common spina bifida that regers to a failure of fusion of the dorsal parts of the lower vertebrae
spina bifida occulta
spectrum of defects that are a result of the abnormal migration of developing cortical neurons
cortical dysplasia
forebrain
prosencephalon
outer layer of cerebrum
cerebral cortex
cerebrum
telencephalon
group of stuctures linked to the thalamus in the base of the brain
involved in the coordination of movement
basal ganglia
associated with memory and spatial navigation
hippocampus
first to develop; involved in the sense of smell
olfactory bulb
collection of stuctures located in the front and below the striatum that includes the nucleus accumbens
basal forebrain
the caudal posterion part of the forebrain that contains the thalamic group and the third ventricle group
diencephalon
parts of the diencephalon
thalamus hypothalamus epithalamus ventral thalamus 3rd ventricle
midbrain
mesencephalon
anatomic; brain, brainstem and spinal cords are parts of it
central nervous system
begins at the foramen magnum; central canal
spinal cord
site at the base of the skill where the medulla ends
foramen magnum
nerve fibres that form the ascending and descending pathways
white matter
located at the center of the spinal cord and contains the cell bodies of neurons
gray matter
connected to the brainstem via 3 cerebellar peduncles
cerebellum
cerebral hemisphere for motor
frontal
cerebral hemisphere for sensory
parietal
cerebral hemisphere for memories
temporal
cerebral hemisphere for visual processing
occipital
dense network of peripheral nerves
plexus
outside the brain, brainstem and spinal cord; anatomical
peripheral nervous system
functional
controls endocrine glands and homeostatic system
Autonomic nervous system
collection of structures locate to the front and below striatura
basal forebrain
located in the brain stem and sacrum
preganglionic neurons
located in the vertebral and prevertebral ganglia
postganglionic neurons
severe pain and autonomic changes confined to a single limb
reflex sympathetic dystrophies
additional cell loss in the basal ganglia and cerebellum
multiple system atrophy
motor functions and movement
enteric
lies between the longitudinal and circular muscle layers
myenteric plexus
lies between the circular muscle and muscularis mucosa
submucosal plexus
localized absence of enteric nervous system in the colon causing constipation at birth
hirschprung’s disease
local degeneration of intrinsic neurons
parkinsons disease
feelings in a critical situation
sympathetic
post ganglionic trasmitter
noradrenaline
feelings in everyday situations
parasympathetic
hindbrain
rhombencephalon
pons and cerebellum
metencephalon
medulla
myelencepahon
stages of the egg
fertilized egg 2 cell 4 cell 8 cell morula blastula early gastrula gastrula