Central Nervous System Flashcards
What makes up the Central Nervous System (CNS)?
Brain and Spinal Cord
What protects the brain?
Skull
What protects the spinal cord?
Vertebral column
What is the weight range of the human brain?
Between 2 ¼ and 3 ¼ pounds
How many neurons does the brain contain?
100 billion neurons
What are the 4 major anatomic regions of the brain?
- Cerebrum
- Diencephalon
- Brain Stem
- Cerebellum
What is the largest and uppermost part of the brain?
Cerebrum
What are the grooves in the brain called?
Sulci
What are the deepest sulci called?
Fissures
What divides the cerebrum into right and left hemispheres?
A fissure
What are the four lobes of the cerebrum?
- Frontal
- Parietal
- Occipital
- Temporal
Which side of the brain controls the left side of the body?
Right side of the brain
Which side of the brain controls the right side of the body?
Left side of the brain
Where is the primary motor cortex located?
In front of the central sulcus
What does the primary motor cortex control?
Movements
What area in the left frontal lobe controls tongue and lip movements required for speech?
Broca’s area
What functions does the frontal lobe control?
- Memory
- Intelligence
- Behavior
- Emotions
- Motor function
- Smell
- Conscious thought
What is the location of the primary somatic sensory cortex?
Right behind the central sulcus
What does the primary somatic sensory cortex interpret?
Sensory impulses from the skin, internal organs, muscles, and joints
What are the functions of the parietal lobe?
- Taste
- Senses
What is the main function of the occipital lobes?
Vision
What is the main function of the temporal lobes?
Hearing
What is the outer surface of the cerebrum composed of?
Gray matter
What is the corpus callosum?
Thick mass of nerves connecting the two cerebral hemispheres
