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Nervous System 3
(Exam 3)
9
Anatomy
Undergraduate 2
11/05/2011

Additional Anatomy Flashcards

 


 

Cards

Term

 

What are the 4 major vessels that contribute to the formation of the arterial circle on the base of the brain?

Definition



2 vertebral arteries and 2 internal carotid arteries

Term

 

 

3 main parts of the brain and their overall functions

Definition

cerebrum

  • interpretation
  • initiation of voluntary movements
  • memory
  • reasoning
  • intelligence and personality
cerebellum
  • maintain posture & balance
  • maintain muscle tone
  • coordinate voluntary muscle activity and reflexes
brain stem
  • involuntary movements
  • communication between cerebrum and cerebellum
Term

 

 

What features of the cerebrum increase the surface area for neuronal connections?

Definition

 

 

gyri (bumps) & sulci (grooves)

Term

 

 

What are the fiber tracts in the cerebrum?

Definition

1. association tracts (connect neurons in same area)

2. commissural tracts (connect neurons in contralateral hemispheres, e.g. the corpus callosum)

3. projection tracts (transmit impulses from cerebrum to other areas of brain and spinal cord)

Term

 

 

What comprises the diencephalon?

Definition

 

 

thalamus and hypothalamus

Term

 

 

What specific motor areas are part of the cerebral cortex?

Definition

 

1. primary motor cortex

2. premotor cortex

3. Broca's area

4. Prefrontal cortex

Term

 

 

What specific sensory areas are part of the  cerebral cortex?

Definition

 

 

1. primary somatosensory cortex

2. somatosensory association area

Term

 

 

What's the homunculcus idea?

Definition

 

 

The homunculcus shows the relative regions and amount of cortex that is devoted to different regions of the body

Term

 

 

What are the primary functions of the cerebellum and the parts of the brainstem?

Definition

functions of cerebellum:

1. maintain posture & balance

2. maintain muscle tone

3. coordinate voluntary muscle activity and reflexes

 

parts of brainstem:

1. midbrain

2. pons

3. medulla

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