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What Is Cerebellum, Describe It Terms In Brain Anatomy Flashcards
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Side A ------ Side B Cerebellum ------ balance and posture; sensorimotor learning and some other aspects of cognitive functioning Cerebellum in conjunction with basal ganglia and motor cortex ------ vital to performance of coordinated and refined motor movements Smaller-than-normal cerebellum ------ linked to Autism Damage to cerebellum ------ Ataxia (slurred speech, severe tremors, loss of balance) Reticular Formation ------ respiration, coughing, vomiting, posture, locomotion, REM sleep Reticular Activating System (RAS) ------ part of reticular formation; consciousness, arousal, wakefulness; screens sensory input (esp. during sleep), arouses higher centers of brain when imp. info. must be processes Damage to Reticular Formation ------ disruption of sleep-wake cycle, can produce coma-like state of sleep Forebrain ------ subcortical and cortical structures Name subcortical structures ------ thalamus, hypothalamus, basal ganglia, limbic system Thalamus ------ "relay station," transmits incoming sensory information to the appropriate areas of the cortex for all senses except olfaction (that goes directly to amygdala); motor activity, language, memory Korsakoff Syndrome ------ thalamus, mammillary bodies of hypothalamus; thiamine deficiency, usually from alcoholism; severe anterograde amnesia, retrograde amnesia, confabulation hypothalamus ------ hunger, thirst, sex, sleep, body temp, movement, emotional reactions, initiates responses needed to maintain homeostasis Damage to hypothalamus ------ uncontrollable laughter, intense rage, aggression Suprachiasmatic Nucleus (SCN) ------ located in hypothalamus; mediates sleep-wake cycle and other circadian rhythms; maybe involved in seasonal affective disorder Structures of basal ganglia ------ caudate nucleus, putamen, globus pallidus, substantia nigra Basal Ganglia ------ planning, organizing, coordinating voluntary movement, regulating amplitude and direction of motor actions, sensorimotor learning, stereotyped motoric expressions of emotional states (such as smiling when happy) Disorders with motor symptoms that are associated with basal ganglia ------ Huntington's disease, Parkinson's disease, Tourette's syndrome Other basal ganglia-related disorders ------ mania, depression, ocd, psychosis Limbic system ------ primarily associated with the mediation of emotion Parts of the limbic system ------ Amygdala, Hippocampus Amgdala functions ------ integrates, coordinates, directs motivational and emotional activities, attaches emotions to memories, involved in recall of emotionally-cahrge experiences Kluver-Bucy syndrome ------ lesions in the amygdala and temporal lobes in primates caused: reduced fear and aggression, increased docility, compulsive oral exploratory behaviors, altered dietary habits, produced hypersexuality and "psychic blindness" (inability to recognize significance or meaning of events or objects) Hippocampus functions ------ learning and memory (less implicated in emotions than other limbic structures); processes spatial, visual, and verbal information, consolidates declarative memories Damage to hippocampus in conjunction with removal of temporal lobes ------ anterograde amnesia and retrograde amnesia (for events up to 3 years before surgery) List lobes that make up each hemisphere of the Cerebral Cortex (cortical structures) ------ Frontal, Parietal, Temporal, Occipital Name areas of frontal lobe ------ motor, premotor, prefrontal Primary motor cortex functions ------ control of voluntary movements Damage to primary motor cortex ------ loss of reflexes and flaccid hemiplegia (loss of muscle tone) in areas of body contralateral to the damage Premotor cortex functions ------ contains Broca's area (usually on left side); speech production Damage to Broca's area ------ Broca's (expressive) aphasia; difficulties in producing spoken and written language Prefrontal cortex functions ------ emotion, memory, self-awareness, executive (higher-level cognitive) functions Name 2 types of personality change associated with damage to prefrontal cortex ------ Pseudodepression, Pseudopsychopathy Symptoms of pseudodepression ------ apathy, lethargy, narrowing of interests, reduced emotional reactions, reduced interest in sex, impaired memory and attention Symptoms of pseudopsychopathy ------ loss of social tact, lack of empathy, impulsivity, sexual disinhibition, inappropriate jocularity Cognitive deficits related to damage to prefrontal cortex ------ problems with abstract thinking, planning ability, decision-making; perseveration, inability to remember the temporal order of events Hypofrontality (reduced metabolism in the prefrontal cortex) ------ linked to Schizophrenia, ADHD, normal age-related cognitive declines Parietal lobe contains the... ------ somatosensory cortex Functions of somatosensory cortex ------ governs pressure, temp, pain, proprioception, and gustation Damage to parietal lobe ------ disturbances in spatial orientation, apraxia, somatosensory agnosia Define apraxia ------ inability to perform skilled motor movements in the absence of impaired motor functioning Define somatosensory agnosia ------ Inability to recognize familiar objects with use of the senses Define tactile agnosia ------ inability to recognize familiar objects by touch Define asomatognosia ------ failure to recognize parts of one's own body Define anosognosia ------ inability to recognize one's own neurological symptoms or other disorder Damage specifically to the right parietal lobe ------ contralateral neglect Define contralateral neglect ------ loss of knowledge about or interest in the left side of the body Damage specifically to the left parietal lobe ------ ideational apraxia, ideomotor apraxia, Gertsmann syndrome Define ideational apraxia ------ inability to carry out a sequence of actions Define ideomotor apraxia ------ inability to carry out a simple action in response to a command Gertsmann syndrome ------ finger agnosia, right-left confusion, agraphia, acalculia Temporal lobe contains the... ------ auditory cortex Functions of auditory cortex ------ mediates auditory sensation and perception Damage to the auditory cortex ------ auditory agnosia, auditory hallucinations, other disturbances in auditory sensation and perception Location of Wernicke's area ------ located in left temporal lobe Functions performed in Wernicke's area ------ receptive; involved in comprehension of language Damage to Wernicke's area ------ Wernicke's (receptive) aphasia, characterized by severed deficits in language comprehension and abnormalities in language production Function of areas of temporal lobe (other than Wernicke's area) ------ mediate encoding, retrieval, and storage of long-term declarative memories Electrical stimulation of areas in temporal lobe ------ complex, vivid memories that had been previously forgotten Damage to areas of temporal lobe ------ retrograde and anterograde amnesia The occipital lobe contains the... ------ visual cortex Functions of visual cortex ------ visual perception, recognition, and memory Damage to occipital lobes ------ visual agnosia, visual hallucinations, cortical blindness, simultanagnosia Damage to occipital lobe at junction with occipital, temporal, and parietal lobes ------ prosopagnosia Define visual agnosia ------ inability to recognize familiar objects Define simultanagnosia ------ inability to see more than one thing or one aspect of an object at a time Define prosopagnosia ------ inability to recognize familiar faces Name the structures of the hindbrain ------ brain stem (medulla and pons), cerebellum Function of the medulla ------ influences flow of information between the spinal cord and the brain, coordinates swallowing, coughing, and sneezing, regulates vital functions including breathing, heartbeat and blood pressure Damage to medulla ------ usually fatal Function of the pons ------ connects two halves of cerebellum and plays a role in the integration of movements in the right and left sides of body
Side A ------ Side B Cerebellum ------ balance and posture; sensorimotor learning and some other aspects of cognitive functioning Cerebellum in conjunction with basal ganglia and motor cortex ------ vital to performance of coordinated and refined motor movements Smaller-than-normal cerebellum ------ linked to Autism Damage to cerebellum ------ Ataxia (slurred speech, severe tremors, loss of balance) Reticular Formation ------ respiration, coughing, vomiting, posture, locomotion, REM sleep Reticular Activating System (RAS) ------ part of reticular formation; consciousness, arousal, wakefulness; screens sensory input (esp. during sleep), arouses higher centers of brain when imp. info. must be processes Damage to Reticular Formation ------ disruption of sleep-wake cycle, can produce coma-like state of sleep Forebrain ------ subcortical and cortical structures Name subcortical structures ------ thalamus, hypothalamus, basal ganglia, limbic system Thalamus ------ "relay station," transmits incoming sensory information to the appropriate areas of the cortex for all senses except olfaction (that goes directly to amygdala); motor activity, language, memory Korsakoff Syndrome ------ thalamus, mammillary bodies of hypothalamus; thiamine deficiency, usually from alcoholism; severe anterograde amnesia, retrograde amnesia, confabulation hypothalamus ------ hunger, thirst, sex, sleep, body temp, movement, emotional reactions, initiates responses needed to maintain homeostasis Damage to hypothalamus ------ uncontrollable laughter, intense rage, aggression Suprachiasmatic Nucleus (SCN) ------ located in hypothalamus; mediates sleep-wake cycle and other circadian rhythms; maybe involved in seasonal affective disorder Structures of basal ganglia ------ caudate nucleus, putamen, globus pallidus, substantia nigra Basal Ganglia ------ planning, organizing, coordinating voluntary movement, regulating amplitude and direction of motor actions, sensorimotor learning, stereotyped motoric expressions of emotional states (such as smiling when happy) Disorders with motor symptoms that are associated with basal ganglia ------ Huntington's disease, Parkinson's disease, Tourette's syndrome Other basal ganglia-related disorders ------ mania, depression, ocd, psychosis Limbic system ------ primarily associated with the mediation of emotion Parts of the limbic system ------ Amygdala, Hippocampus Amgdala functions ------ integrates, coordinates, directs motivational and emotional activities, attaches emotions to memories, involved in recall of emotionally-cahrge experiences Kluver-Bucy syndrome ------ lesions in the amygdala and temporal lobes in primates caused: reduced fear and aggression, increased docility, compulsive oral exploratory behaviors, altered dietary habits, produced hypersexuality and "psychic blindness" (inability to recognize significance or meaning of events or objects) Hippocampus functions ------ learning and memory (less implicated in emotions than other limbic structures); processes spatial, visual, and verbal information, consolidates declarative memories Damage to hippocampus in conjunction with removal of temporal lobes ------ anterograde amnesia and retrograde amnesia (for events up to 3 years before surgery) List lobes that make up each hemisphere of the Cerebral Cortex (cortical structures) ------ Frontal, Parietal, Temporal, Occipital Name areas of frontal lobe ------ motor, premotor, prefrontal Primary motor cortex functions ------ control of voluntary movements Damage to primary motor cortex ------ loss of reflexes and flaccid hemiplegia (loss of muscle tone) in areas of body contralateral to the damage Premotor cortex functions ------ contains Broca's area (usually on left side); speech production Damage to Broca's area ------ Broca's (expressive) aphasia; difficulties in producing spoken and written language Prefrontal cortex functions ------ emotion, memory, self-awareness, executive (higher-level cognitive) functions Name 2 types of personality change associated with damage to prefrontal cortex ------ Pseudodepression, Pseudopsychopathy Symptoms of pseudodepression ------ apathy, lethargy, narrowing of interests, reduced emotional reactions, reduced interest in sex, impaired memory and attention Symptoms of pseudopsychopathy ------ loss of social tact, lack of empathy, impulsivity, sexual disinhibition, inappropriate jocularity Cognitive deficits related to damage to prefrontal cortex ------ problems with abstract thinking, planning ability, decision-making; perseveration, inability to remember the temporal order of events Hypofrontality (reduced metabolism in the prefrontal cortex) ------ linked to Schizophrenia, ADHD, normal age-related cognitive declines Parietal lobe contains the... ------ somatosensory cortex Functions of somatosensory cortex ------ governs pressure, temp, pain, proprioception, and gustation Damage to parietal lobe ------ disturbances in spatial orientation, apraxia, somatosensory agnosia Define apraxia ------ inability to perform skilled motor movements in the absence of impaired motor functioning Define somatosensory agnosia ------ Inability to recognize familiar objects with use of the senses Define tactile agnosia ------ inability to recognize familiar objects by touch Define asomatognosia ------ failure to recognize parts of one's own body Define anosognosia ------ inability to recognize one's own neurological symptoms or other disorder Damage specifically to the right parietal lobe ------ contralateral neglect Define contralateral neglect ------ loss of knowledge about or interest in the left side of the body Damage specifically to the left parietal lobe ------ ideational apraxia, ideomotor apraxia, Gertsmann syndrome Define ideational apraxia ------ inability to carry out a sequence of actions Define ideomotor apraxia ------ inability to carry out a simple action in response to a command Gertsmann syndrome ------ finger agnosia, right-left confusion, agraphia, acalculia Temporal lobe contains the... ------ auditory cortex Functions of auditory cortex ------ mediates auditory sensation and perception Damage to the auditory cortex ------ auditory agnosia, auditory hallucinations, other disturbances in auditory sensation and perception Location of Wernicke's area ------ located in left temporal lobe Functions performed in Wernicke's area ------ receptive; involved in comprehension of language Damage to Wernicke's area ------ Wernicke's (receptive) aphasia, characterized by severed deficits in language comprehension and abnormalities in language production Function of areas of temporal lobe (other than Wernicke's area) ------ mediate encoding, retrieval, and storage of long-term declarative memories Electrical stimulation of areas in temporal lobe ------ complex, vivid memories that had been previously forgotten Damage to areas of temporal lobe ------ retrograde and anterograde amnesia The occipital lobe contains the... ------ visual cortex Functions of visual cortex ------ visual perception, recognition, and memory Damage to occipital lobes ------ visual agnosia, visual hallucinations, cortical blindness, simultanagnosia Damage to occipital lobe at junction with occipital, temporal, and parietal lobes ------ prosopagnosia Define visual agnosia ------ inability to recognize familiar objects Define simultanagnosia ------ inability to see more than one thing or one aspect of an object at a time Define prosopagnosia ------ inability to recognize familiar faces Name the structures of the hindbrain ------ brain stem (medulla and pons), cerebellum Function of the medulla ------ influences flow of information between the spinal cord and the brain, coordinates swallowing, coughing, and sneezing, regulates vital functions including breathing, heartbeat and blood pressure Damage to medulla ------ usually fatal Function of the pons ------ connects two halves of cerebellum and plays a role in the integration of movements in the right and left sides of body
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