Introduction to CNS Flashcards
(21 cards)
The Nervous System-Functions
- To collect,process and respond to information in the environment
- To co-ordinate the working of different organs and cells in the body
The Nervous System-Divisions
- Structurally
- Functionally
Structural Components of the Nervous System
- CNS
- PNS
The Nervous System-Central Nervous System-Where?
- Brain
- Spinal Cord
The Nervous System-Central Nervous System-Functions
- Directs the body’s internal function
- Integrates sensory impulses
- Provides the property for our conscious, speech etc
The Nervous System-PNS-Role
It transmits messages, via millions of neurons, to and from the CNS
What are the Components of the PNS?
- Somatic Nervous System
- Autonomic Nervous System
Somatic Nervous System-Role and Function
- Carries Sensory and Motor information to and from the CNS
- Controls muscle receptors
Autonomic Nervous System-Role and Function
Regulates involuntary bodily functions eg:Breathing,Digestion
What is the Smallest Unit of the Nervous System
The Neuron
Grey Matter-What does it Contain?
- The neurons body
- Synapses
- Wiring eg:dendrites
Grey Matter-Area with high levels of Grey Matter
Areas of the brain with high amounts of Grey matter include areas that control muscle movement and sensory activity eg:Cerebral Cortex and Cerebellum
White Matter-What does it Contain?
Contains myelinated axons that implement global communication
Damage to White Matter
Damage to white matter can have an effect on brain function
-Damage can affect the brain’s nerve pathways
What does Damage to White Matter Cause?
- Multiple Sclerosis
- White Matter Disease
Multiple Sclerosis
Caused by the destruction of the myelin coating of a neuron
White Matter Disease
Affects blood vessels within the white matter
-Cause of ⅕ of all strokes
The Cerebrum-Function
- Enables sensory perception
- Voluntary motor actions
- High cognitive functions
The Cerebrum-Location
The 4 lobes of the brain
The Cerebellum-Function
Coordination of movements
- Fine tuning of motor activities
- Plays a role in visual recognition, language, attention, memory and emotion
- Receives information from the sensory systems
The Cerebellum-Damage
Damage could lead to a lack of balance, slower movements and tremors
