Disorders affecting region: depression anxiety
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1 Amygdala Involved in learning, and the processing of emotional memories. Measures sensory input for potential threat level, then hypothalamus Regulates volatile emotions like fear and anger. Disorders affecting region: depression anxiety
2 Cerebrum -The largest division of the brain. It is divided into two hemispheres, each of which is divided into four lobes. Cerebrum Cerebrum Cerebellum
3 Cerebral Cortex - The outermost layer of gray matter making up the superficial aspect of the cerebrum. Neurons in cerebral cortex: 16.5 billion Glial cells in cerebral cortex: 60 billion Cerebral Cortex Cerebrum Receives and processes sensory information. Made up of densely packed neurons we call gray matter. Glial Cells Supports brain cells, creates myelin, involved with learning and thinking, they clean up NT s and ions. Neural nannies
4 White matter 60% of brain Myelinated (causes color) Transmission to and from gray, and from gray to other parts of the body Gray matter 40% brain Gray nuclei causes color No myelin Processing and decisions
5 Cerebral Features: Gyri Elevated ridges winding around the brain. Sulci Small grooves dividing the gyri Central Sulcus Divides the Frontal Lobe from the Parietal Lobe Fissures Deep grooves, generally dividing large regions/lobes of the brain Longitudinal Fissure Divides the two Cerebral Hemispheres Transverse Fissure Separates the Cerebrum from the Cerebellum Sylvian/Lateral Fissure Divides the Temporal Lobe from the Frontal and Parietal Lobes
6 Gyri (ridge) Sulci (groove) Fissure (deep groove)
7 Specific Sulci/Fissures: Central Sulcus Longitudinal Fissure Sylvian/Lateral Fissure Transverse Fissure
8 Cerebral Cortex Principles Lateralization The two different cerebral hemispheres (halves of the brain) DO differ. The hemispheres are connected via the corpus callosum.
9 Cerebral Cortex Principles CORPUS CALLOSUM Largest white matter structure in the brain. Neural fibers connecting left and right lobes. Allows communication between hemispheres. Primary function is to connect gray areas together with neural impulses.
10 Cerebral Cortex Principles contralaterality the right half of your brain controls the left half of your body and vice versa. (contralateral control.) Localization of function Specific mental processes are correlated with discrete regions of the brain. Explicit memory encoding????? talking to the endocrine system Forming words We will find out Thinking of words We will find out????? Hemispheric Specialization (lateralization) Each lobe of the brain has specialized functions (Have to be careful with this one.)
11 Common Myths There is a lot of pop psychology about hemispheric specialization Broad statements like the left brain is logical and the right brain is creative are almost always gross over-generalizations MYTHS: Lefties are better at spatial and creative tasks. Righties are better at logic.
12
13 Hemispheric Specialization Traditional understanding: Left side processes: Speech Analysis Time Sequence It Recognizes: Letters Numbers Words Right side processes: Creativity Patterns Spatial Awareness Context It Recognizes: Faces Places Objects
14 The left brain/right brain myth in advertising
15
16 Variations
17 Hemispheric Specialization While there are some specialized functions in certain hemispheres of the brain, it is an oversimplification to say that one is right-brained or left-brained. The two hemispheres do NOT operate independently; they communicate constantly, mostly via the corpus callosum There are many more similarities between the hemispheres than differences. To completely lose a particular mental faculty, a person normally needs to suffer damage to a particular area in both the left and right hemispheres.
18 The Cerebral Cortex is made up of four Lobes.
19 Structure of the Cortex occipital lobe: brain lobe at the back of the head responsible primarily for vision Contains Visual Cortex: Processes and interprets messages from our eyes into images we can understand
20 Structure of the Cortex temporal lobe: the brain lobe under the temples, in front of the ears many functions, including processing sounds, committing information to memory, and comprehending language Interpreted in Auditory Cortex. PARTIALLY LATERALIZED
21 Structure of the Cortex parietal lobe: brain lobe at the top and center/rear of the head Contains SomatoSensory Cortex: receives incoming touch sensations from rest of the body. Most of the Parietal Lobes are made up of Association Areas, which integrates sensations.
Specific Sulci/Fissures:
Specific Sulci/Fissures: Central Sulcus Longitudinal Fissure Sylvian/Lateral Fissure Transverse Fissure http://www.bioon.com/book/biology/whole/image/1/1-8.tif.jpg http://www.dalbsoutss.eq.edu.au/sheepbrains_me/human_brain.gif
More informationHemispheric Specialization (lateralization) Each lobe of the brain has specialized functions (Have to be careful with this one.)
Cerebral Cortex Principles contralaterality the right half of your brain controls the left half of your body and vice versa. (contralateral control.) Localization of function Specific mental processes
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