Development And Change In The Nervous System Flashcards
(15 cards)
Proliferation
Cells that will become neurons divide and multiply (250,000 new cells every minute)
Migration
Newly formed neurons move ventricular zone
Inner brain layer) outward (outer brain layer
Circuit formation
Axons of developing neurons grow toward their target cells and form functional connections
Circuit pruning
Eliminating excess neurons and incorrect synapses
Higher your brain cells Myelinating…
Last
Myelination continues through…
Adolescents and later
Experience modifies…
The nervous system
Reorganization
A shift in connections that changes the functions of an area of the brain
Can be an advantage or disadvantage
Damage in recovery in the CNS
Stroke/cerebrovascular accident
Dramatic brain injury or TBI
Concussions
Stroke/cerebrovascular accident
Loss of blood flow in the brain
Traumatic brain injury or TBI
Caused by an external force, sudden acceleration or deceleration or penetration
Concussions
Peripheral nervous system – the automatic nervous system includes
Sympathetic nervous system
Parasympathetic nervous system
Primary function is motor
Sympathetic nervous system
Rises from the middle of the spinal cord (thoracic and Humbar)
Ganglia (cell bodies) are highly interconnected
Tends to respond as a unit (whole body)
Parasympathetic nervous system
Rises from the extreme ends of the PNS; cranial nerves and spinal nerves at lower end
Ganglia are not interconnected
Tends to operate more independently
State of development
Proliferation
Migration
Circuit formation
Circuit pruning
