PSY3326(Ch.2Notes).docx - Aram Garabedian PSY 3326 The Systems of the Body The Nervous System The nervous system is a complex network of interconnected

PSY3326(Ch.2Notes).docx - Aram Garabedian PSY 3326 The...

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Aram Garabedian PSY 3326 9/25/19 The Systems of the Body The Nervous System The nervous system is a complex network of interconnected nerve fibers made up of the central nervous system (brain & spinal cord), and the peripheral nervous system (nerves in the body including those that connect the brain and spinal cord) Sensory nerve fibers provide input to the brain and spinal cord by carrying signals from sensory receptors o Controls your senses Motor nerve fibers provide output from the brain or spinal cord to muscles and other organs, resulting in voluntary and involuntary movement o Controls your movements Sympathetic Nervous System- prepares the body to respond to emergencies, to strong emotions (anger/fear), and to strenuous activity o Fight or flight system is most likely controlled by (or in) this system Parasympathetic Nervous System- controls the activities of organs under normal circumstances and acts against the sympathetic nervous system o After an emergency, the PNS takes over for your body to recover The Brain Medulla - regulates heart rate, blood pressure, and respiration o Also lets you know about the levels of carbon dioxide and oxygen in the body Can cause altered breathing to cope/compensate for fluctuating levels Pons - a link between the hindbrain and the midbrain and also helps control respiration Cerebellum - coordinates voluntary muscle movement, the maintenance of balance and equilibrium, and the maintenance of muscle tone and posture o Controls your conscious muscle movements The Forebrain Thalamus- helps recognition of sensory stimuli and the relay of sensory impulses to the cerebral cortex Hypothalamus - helps regulate cardiac functioning, blood pressure, respiration, water balance, and appetites (hunger/sexual desire) o Plays an important role between your thoughts in your cerebral cortex and their impact on internal organs Cerebral Cortex - involved in higher-order intelligence, memory, and personality o Largest portion of the brain o Interprets sensory impulses that come from the peripheral areas of the body o Frontal, parietal, temporal, and occipital lobes Frontal - voluntary movement Parietal - sensations of touch, pain, temperature, and pressure are registered and interpreted (somatosensory cortex) Temporal - contains the cortical areas responsible for auditory and olfactory (smell) impulses Occipital - contains the visual cortex, which receives visual impulses The Limbic System plays an important role in stress and emotional responses o Amygdala - detection of threat o Hippocampus - emotionally charged memories o Ex. Chronic Traumatic Encephalopathy (CTE)
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Aram Garabedian PSY 3326 9/25/19 The Role of Neurotransmitters Neurotransmitters - regulate nervous system functioning Catecholamines - epinephrine and norepinephrine o Carried through the bloodstream to promote sympathetic activation(?) Disorders of the Nervous System Epilepsy Parkinson's Disease Cerebral Palsy Multiple Sclerosis
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