USA Neuroscience Final Exam 2023/2024 with 100% correct answers

What are the major functions of the cerebellum? - correct answer Receives sensory info from the spinal cord about body position/mvmt. Exerts its influence by sending info back to motor systems of the cortex and brainstem to correct the mvmt. Detects any mvmt that deviates from the cortical command. Error detector mvmt corrector. What are the functions, inputs and outputs of each functional division of the cerebellum? - correct answer Fxns: Lateral Hemi:Motor Planning, Intermediate:distal limb coord Vermis/flocculonodular lobe:prox limb and trunk cooridination Inputs: Outputs: Dentate, Emboliform, Globase, Fastigial, Vestibular Nuclei What are the major input pathways to the cerebellum and what afferent information do they convey? - correct answer Mossy Fibers:Excitatory Climbing Fibers:Excitatory What are the S/S of cerebellar infarcts and cerebellar hemorrhages? - correct answer Vertigo, n/v, horizantal nystagmus, limb ataxia, unsteady gait, and HA Clinical Findings and Localization of Cerebellar Lesions - correct answer Ataxic mvmts, dysrhythmia, dysdiadochokinesia and dysmetrias What is ataxia? - correct answer (Lack of order) disordered contractions of agonist and antagonist muscles and lack of normal corrdination btwn mvmts at different joints, mvmts consist of continuous overshooting and overcoming What are the 3 major functions of the Cerebellum? - correct answer Synergy of mvmt/motor learning, maintenance of upright posture, maintenance of Tone during a muscle contraction. What lesions to the intermediate cerebellum would affect what? - correct answer Extremity cooridinatio