3.2 Structure and Function of the CNS notes Flashcards Preview

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1

The Central Nervous System consists of the _____ and the _______

The Central Nervous System consists of the brain and the spinal cord

2

What are 5 functions of the central nervous system?

  1. Regulate internal environment
  2. experience emotions
  3. voluntarily control movements
  4. percieve
  5. engage in higher cognitive processes (thought and memory)

3

Define Cognition

the act or process of knowing, including both awareness and judgement

4

What are the 6 regions of the brain (and their subcomponents where applicable)?

  1. Cerebral Cortex
  2. Basal Nuclei
  3. Thalamus
  4. Hypothalamus
  5. Cerebellum
  6. Brainstem
    • midbrain, pons, and medulla

5

what are 5 major functions of the cerebral cortex?

  1. Sensory perception
  2. voluntary control of mvmt
  3. language
  4. personality traits
  5. sophisticated mental events, such as thinking, memory, decision making, creativity and self-consciousness

6

What are three functions of the Basal Nuclei?

  1. Inhibition of muscle tone
  2. Coordination of slow, sustained movements
  3. supression of useless patterns of movements

7

What are four major functions of the hypothalamus?

  1. Relay station for all synaptic output
  2. Crude awareness of sensation
  3. some degree of consciousness
  4. Role in motor control

8

What are four major functions of the hypothalamus?

  1. Regulation of homeostatic functions
  2. Important link btwn nervous and endocrine systems
  3. extensive involvement in emotion and basic behavioural patterns
  4. Role in sleep wake cycle 

9

What are three major functions of the cerebellum?

  1. Maintenance of balance
  2. Enhancement of muscle tone
  3. Coordination and planning of skilled voluntary muscle activity

10

What are five functions of the brain stem (pons, midbrain, medulla)?

  1. Origin of majority of peripheral cranial nerves (all 3)
  2. Cardiovascular, respiratory, and digestive control centres
  3. Regulation of muscle reflexes involved with equilibrium and posture
  4. reception and integration of all synaptic input from the spinal cord
  5. Role in sleep wake cycle

11

The brainstem (primitive brain) controls the "vegetative functions", what does this mean?

Contols the life-sustaining processes (respiration, circulation, digestion) that are performed unconsciously. 

12

The cerebellum is concerned with ________ (i.e. maintained proper position of body in space) and subconcious ______ of movement.

It also plays a key role in _______

The cerebellum is concerned with proprioception (i.e. maintained proper position of body in space) and subconcious coordination of movement.

It also plays a key role in learning skilled motor tasks (eg a dance routine)

13

The hypothalamus and thalamus are housed within the _______, which is located on top of the brainstem tucked within the interior of the cerebrum 

The hypothalamus and thalamus are housed within the diencephalon, which is located on top of the brainstem tucked within the interior of the cerebrum 

14

In humans, the cerebrum constitutes about ____% of the total brain weight

In humans, the cerebrum constitutes about 80% of the total brain weight

15

The ______ is located on top of the lower brain regions and is highly convoluted

The Cerebrum is located on top of the lower brain regions and is highly convoluted

16

The outer layer of the cerebrum is the highly convoluted _______, which caps an inner core that houses the _______

The outer layer of the cerebrum is the highly convoluted cerebral cortex (human brain), which caps an inner core that houses the basal ganglia