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Central Nervous System - composed of the brain and spinal cord |
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The process that develops the head |
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Ridges in the cerebral hemisphere |
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Form the superior part of the brain and make up 83% of its mass. |
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Shallow grooves of the cerebral hemisphere. |
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Deep grooves of the cerebral hemisphere. |
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Deep fissures of the cerebral hemisphere. |
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Separate the cerebral hemispheres. Runs from between your eyes to the back of your head. |
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Deep sulci divide the hemispheres into five lobes: |
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Frontal, parietal, temporal, occipital, and insula. |
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Separated the frontal and parietal lobes. |
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Separates the parietal and occipital lobes. |
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Separates the parietal and temporal lobes. |
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The precentral and postcentral gyri |
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Border the central sulcus |
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Superficial (surface) gray matter; accounts for 40% of the mass of the brain. Enables sensation, communication, memory, understanding, and voluntary movements. Each hemisphere controls the opposite side of the body. |
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Three types of functional areas of the cerebral cortex: |
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Motor areas, sensory areas, and association areas. |
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Motor area of cerebral cortex |
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Controls voluntary movement |
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Sensory Areas of the cerebral cortex |
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Conscious awareness of sensation |
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Association areas of the cerebral cortex |
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Integrate diverse information |
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Connect corresponding gray areas of the two hemispheres. |
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Connect different parts of the same hemisphere |
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Enter the hemispheres from lower brain or cord centers |
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is resposible for communication between the cerebral cortex and lower CNS center, and areas of the cerebrum. |
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Masses of gray matter found deep within the cortical white matter. |
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Diencephalon and its three paired structures: |
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Central core of the forebrain. THree structures are: thalamus, hypothalamus, and epithalamus. |
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The thalamus, hypothalamus, and epithalamus enclose what? |
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egg shaped masses that form the top side walls of the third ventricle. Funtions to recieve input and send it to the cerebral cortex. Mediates sensation, motor activities, cortical arousal, learning, and memory. |
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Located below the thalamus, it caps the brainstem and forms the inferolateral walls of the 3rd ventricle. Connects to the pituitary gland. |
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Most dorsal portion of the diencephalon; forms roof of the 3rd ventricle. |
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Consists of 3 regions: midbrain, pons, and medulla oblongata. Controls autonomic behaviors necessary for survival. |
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Located between the diencephalon and the pons |
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Bulging brainstem region between the midbrain and the medulla oblongata. |
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Most inferior part of the brain stem. ALong with the pons, forms the ventral wall of the 4th ventricle. |
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2 longitudinal ridges formed by the corticospinal tracts |
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Located dorsal to the pons and medulla. Makes up 11% of the brains mass. Made up of two bilaterally symmetrical hemispheres connected medially by the vermis. Each hemisphere has 3 lobes: anterior, posterior, and flocculonodular.[image] |
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Receives impulses of the intent to initiate voluntary muscle contraction. Plays a role in language and problem solving. |
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Bone, meninges, and cerebrospinal fluid. Harmful substances are shielded from the brain by the blood brain barrier. |
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3 connective tissue membranes that lie external to the CNS: dura mater, arachnoid mater, and pia mater. |
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Leathery strong meninx composed of two fibrous connective tissue layers. |
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The middle meninx, which forms a loose brain covering. Seperated from the dura mater by the subdural space. |
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Cerebrovascular Accidents |
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Strokes. Caused when blood circulation to the brain is blocked and brain tissue dies. Most commonly caused by blockage of a cerebral artery. |
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Degenerative Brain Disoders: |
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Alzheimer's disease, Parkinson's disease, and Huntington's disease. |
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Spinal Cord Trauma: Paralysis |
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Spinal Cord Trauma: Flaccid Paralysis |
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Severe damage to the ventral root or anterior horn cells. There is no voluntary or involuntary control of muscles. |
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Spinal cord trauma: Paraplegia |
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Transection between T1 and L1 |
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Spinal Cord Trauma: Quadriplegia |
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Transection in the cervical region |
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The storage and retrieval of information |
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Three principles of memory: |
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Storage, processing, memory traces. |
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Occurs in stages and is continually changing |
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Accomplished by the hippocampus and surrounding structures |
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Chemical or structural changes that encode memory |
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(working memory) A fleeting memory of events that continually happen. Lasts seconds to hours and is limited to 7 or 8 pieces of information. |
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Factors that affect transfer of memory from STM to LTM |
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Emotional state, Rehearsal, Association of old data with new data, and Automatic Memory. |
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Acquired through practice. Involves motor activity. Do not retain the context in which they were learned. |
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Declarative memory. Entails learning explicit information. Stored with context in which it is learned. |
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