BIO 240 1st Edition Lecture 26 Outline of Last Lecture I CNS Brain Anatomy A Gross Anatomy and Function 1 Meninges 2 3 Major Regions 3 External Structures of the cerebrum and cerebellum 4 Internal Structures of the cerebrum and cerebellum 5 Structures of the Brainstem Outline of Current Lecture II Brain Mapping A Frontal Lobe B Parietal Lobe C Occipital Lobe D Temporal Lobe E Tracts of the Brain Current Lecture II Brain Mapping A Frontal Lobe 1 The main area involved in thinking reasoning skills concentrating planning writing and abstract thought 2 Broca s area Controls the ability to physically speak sending signals for motor movement to muscles of mouth Is lateralized and left dominate 3 Pre motor center Learned repetitious skills like learning to play an instrument or ride a bike 4 Primary motor center Voluntary motor command The control center for your skeletal muscle The left side of the brain controls the muscles on the right side of your body B Parietal Lobe 1 Primary somatosensory area Receives input for tough pressure pain and temperature 2 Somatosensory association area Cognition to understand what you are feeling Puts context to the input for senses in the primary somatosensory area For example we can touch something hot and not be able to understand that it is hot These notes represent a detailed interpretation of the professor s lecture GradeBuddy is best used as a supplement to your own notes not as a substitute 3 Primary Gustatory center Area where the brain recognizes taste 4 Gustatory association area Area where the brain perceives the signals for taste received in the primary gustatory center C Occipital Lobe 1 Primary visual center Area that receives signals for sight 2 Visual association center Area that perceives the signals for sight so that you know what you are seeing D Temporal Lobe 1 Primary Olfactory center Area of the brain that receives signals for smell 2 Olfactory association area Area of the brain that perceives the signals for smell so you know what you smell These areas are located deep in the brain Smell is the only sense that is not routed through the thalamus The hypothesis for this is that because smells pass through the BBB and can be so dangerous rerouting around the thalamus decreases reaction time 3 Primary Auditory center Area of the brain that receives signals for hearing 4 Auditory association area Area of the brain that perceives the signals for smell so you know what you hear 5 Wernicke s Area Area of the brain that is involved in speech cognition It helps you understand what you hear Is left dominate Collaborates with the Broca s area E Tracts of the Brain White matter 1 Association tract Runs anterior to posterior 2 Commissural tract Runs laterally side to side linking the left and right hemispheres The corpus callosum is the largest part 3 Projection tract Runs superiorly to inferiorly a The tract that criss crosses causing the left side of the brain to control the right side of the body and vice verse
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