Chapter Three Flashcards
nervous system divided into ________________ and ________________ nervous systems
central; peripheral
Peripheral nervous system is divided into ______________ and _______________.
autonomic; somatic
Autonomic nervous system is divided into ________________ and ______________ (define).
sympathetic (arousing); parasympathetic (calming)
The peripheral system includes ___ cranial nerves and ___ spinal nerves.
13; 31
CNS begins at ___ weeks after conception with ectoderm.
2
head-to-tail
rostrocaudal
_____________ line the inside of neural tube and generate all nerve cells and glia
neuroblasts
first movements due to spontaneous activity in the spinal cord is at ____ weeks.
7.5
By ___ weeks, brain is differentiated into hindbrain, midbrain, and forebrain.
11 weeks
T/F: Almost all neurons were formed in the first 28 weeks.
True
At 38 weeks, the brain weighs about ______ grams, which is ___ the size of an adult brain
350; 1/4
T/F: Axons and dendrites at birth are immature, whereas gyri and sulci are mostly formed. This leads to a darker picture on fMRI scans.
True
migration
the movement of neurons driven by immunoglobulins and chemokine
differentiation
the process where the neuron develops dendrites, axons, and synapses
synaptogenesis
formation of synapses
myelination
process of glia creating fatty sheath; spinal cord –> hindbrain –> midbrain –> forebrain
apoptosis
programmed mechanism for cell death; very common in first 3 years after birth
brain structure involved in Parkinson’s
substantia nigra
brain structure involved in breathing
medulla oblongata
paired nerves
ganglia
afferent (where)
dorsal
efferent (where)
ventral
EEG utilizes ___________.
event-related potentials
Wernicke’s area is involved in ______________________ and is connected to Broca’s area through the ________________________________, nerve fibers which connect those two regions.
language comprehension; arcuate fasciculus.
