PSY2061 Lecture Notes - Lecture 3: Tight Junction, Two-Streams Hypothesis, Active Transport
5 Jun 2018
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PSY2061 – Lecture – Week 3 – Anatomy
• learning objectives
•
o Be able to describe several examples of structurefunction
relationships
o Illustrate the major divisions of the nervous system
o Illustrate the neuroanatomical directions
o Draw and label a cross-section of the spinal cord
o List the 5 divisions of the human brain and their functions
o Familiarity with the bold-face terms in the textbook
• concept 1 -structure and function - related - structure = function - begets
function, enables function
•
o Vibrissae and barrel cortex—structured for providing sensory
input to aid mobility where vision doesn’t suffice
o Bat ear structure—structured to allow navigation in the dark to
find food
o The human nervous system—structured to allow specialized
human functions such as complex cognition, language, complex
forward looking strategies
• concept 2 - the milieu of the nervous system is very controlled and
protected
•
o the nervous system maintains a highly controlled environment
o neurons require highly precise environments to be able to function
properly
o the nervous system has several means of controlling its
environment
o
▪ blood brain barrier
▪ layers of protection around nerves to protect from
mechanical damage
o the brain’s environment
o
▪ meningeal layers
▪
▪ dura - strongest thickest layer of the brain
▪ arachnoid - sits below the dura
▪
▪ both help to protect the brain
▪ choroid plexus
▪
▪ produces CFS
▪ separate blood and brain from each other
▪ tissue forms in the ventricles that make the CFS
▪ the blood brain barrier
▪
▪ only allows in chemicals with certain characteristics
that the brain needs
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