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Flashcards in The Brain and Cranial Nerves Deck (29)
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What is considered the higher brain, and account for 60% of the entire brain mass?

The Cerebrum


What is the cerebrum responsible for?

Higher mental processes, such as thoughts and intentions


What is on the outside of the cerebrum?

The cerebral cortex - Grey Matter


What is underneath the Grey Matter?

White Matter is on the inside


What divides the right from the left cerebral hemisphere?

The longitudinal fissure


What are the lines called that you can see in the brain?

a sulcus


What are the raised ridges that you can see in the brain?

a gyrus


What separates the parietal lobe from the frontal lobe?

The Central Sulcus


Functions of the frontal lobe:

controls voluntary skeletal muscles, has an area for concentration, and responsible for complex problem solving


Functions of the parietal lobe:

sensory areas responsible for temperature, touch, pressure, anything recepted from the skin, helps us understand speech, and the ability for us to use words to express thoughts and feelings


Functions of the occipital lobe:

for vision, combining visual and sensory experiences


Functions of the temporal lobe:

governs hearing, memory of a visual scene, helps us process music and other complex sensory patterns


Describe the Split-Brain function:

Right hemisphere governs the left hemisphere. The left hemisphere governs right hemisphere.


If you're a right-brain oriented person, you're good at:

Music, arts and the imagination


If you're a left-brain oriented person, you're good at:

Numerical skills, computational skill and logic


Where is the Diencephalon located in the brain?

underneath the cerebrum


2 parts of the Diencephalon:

1) Thalamus
2) Hypothalamus


Functions of the Thalamus:

A relay station for sensory information that is on its way to the cerebral cortex. Precisely identifies and localizes a sense in the body. Influences one's body movement when one fearful or angry.


Functions of the Hypothalamus:

Temperature, hunger and thirst regulation center. Controls and integrates the autonomic nervous system. Figures out wether a problem should be responded with the nervous system or the endocrine system.


Function of the Midbrain:

Connects the lower and upper brain. Helps keep track of objects that move.


The Pons has areas specifically for:

respiration, sleep, muscle tone and coordination


Medulla Oblongata 3 vital reflux centers:

1) Cardiac Center: influences heart rate
2) Vasomotor Center: influences blood vessel diameter
3) Inspiratory Center: paces breathing in and out during sneezing, coughing, vomiting, and swallowing


Functions of the Cerebellum:

Plays a role in proprioception, equilibrium balance, has the ability to monitor intentions, keeps track of body positions and works with antagonistic (coordinating) muscle pairing.


Things that protect the brain:

1) The Skull (cranial bone)
2) Meninges: Dura mater, Arachnoid mater, pia mater
3) Cerebrospinal Fluid (CSF) in the subarachnoid space


What is the Blood-Brain Barrier?

Allows separation of blood from the brain, and selects what can move across.


What kind of cells are in the blood-brain barrier?

endothelial cells, kind of glued to gather, forming tight junctions.


What level of glucose does the brain allow through?

100 micrograms per liter.
Thus the blood-brain barrier selectively chooses which glucose molecules to bring across.


What can diffuse easily over the barrier?

oxygen, alcohol...


How is Cerebrospinal Fluid made?

By allowing certain molecules into the brain.