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Lecture 1

SPHR 2106 Lecture Notes - Lecture 1: White Matter, Central Sulcus, Lateral Sulcus


Department
Speech and Hearing Science
Course Code
SPHR 2106
Professor
Schulz
Lecture
1

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QUIZ THURSDAYS 5-10 PM 15 QUESTIONS
Overarching principles of the brain
1. Interconnections
2. Centrality of CNS
3. Hierarchic organization: evolutionary perspective : each level reflects organizational
complexity
a. Brainstem (breathing, blood pressure) and spinal cord are lowest levels
b. Paleomammalian brain: place where hypothalamus( regulates food/water intake,
sex drive) are
c. Highest level: neomammalian brain: controls higher mental functions, ability to
speak, recognize faces, arithmetic
d. Each layer represents increasing levels of complexity
Hierarchical vocal control
Periaqueductal gray: lowest level: responsible for sending out commands to move vocal folds
4. Laterality Organization
a. Right side of body controlled by left hemisphere
b. Left side of body controlled by right hemisphere
c. Crossing midline: decussation
d. Sensory strip
e. Unilateral Functional Differences
i. Left hemisphere specialized for language
1. Area larger on left than right
ii. Right hemisphere specializes in visuospatial information
f. Everything on left visual field: right visual cortex (right hemisphere) goes to right
side of eye
g. Everything on right visual field: left side of eye and to left hemisphere
i. LEFT VISUAL FIELD: RIGHT
ii. RIGHT VISUAL FIELD: LEFT
5. Functional Networking
a. Motor pathways
b. Sensory pathways
6. Topographical Organization
a. Spatial organization of neurons that serve the same function
b. Discrete representation of bod in the brain
i. Central convolution/foldings
ii. Central sulcus (strip of cortex: outer layer of the brain, gray matter,
contains cells bodies, under cortex are white matter tracts that synapse
with other neurons so brain can communicate with itself) and lateral
sulcus
find more resources at oneclass.com
find more resources at oneclass.com
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