Central Nervous System 2 Key Concepts Flashcards
What is a stimulus detected by?
A receptor
Once a stimulus is detected by a receptor, what happens?
The information follows a specific neuronal pathway to the cortical region of the brain, where it is processed.
What bones protect the spinal cord?
Bones of the vertebral column
In what two ways do receptors vary?
Different receptors have different receptive fields
Different receptors adapt differently to particular stimuli
What does sensory and motor information processing involve?
Both primary and association areas.
What does the blood-brain barrier do?
Isolate neural tissue from the general circulation.
How many neurons does each somatosensory pathway consist of?
3
What does the somatic nervous system control?
The movement of skeletal muscles
How many neurons is the somatic nervous system mainly comprised of?
2
What does cerebrospinal fluid act as?
A shock absorber and a diffusion medium for dissolved gases, nutrients, chemical messengers and waste products.
What bones protect the brain?
Bones of the cranium
What are meninges?
Special membranes that protect and support the spinal cord and the brain.
How many somatosensory pathways are there?
3
