NSC 4366 1nd Edition Exam 3 Study Guide Lectures 12 14 Lecture 12 Cerebellum cerebellum sits on top of the pons cerebellar peduncle is just fiber bundles inputs arrive at the cerebellar cortex cortex works its magic and projects to deep nuclei deep nuclei provide the cerebellar output anterior lobe is in the front flocculonodular lobe came evolutionarily first longitudinal from side to side vermis is the midline structure paravermis paramedian is lateral to the vermis lateral zone is involved in motor skills of the hand skilled movement biggest part in cerebellum vermis invoved in trunk balance paravermis involved in proximal limbs biceps triceps quads hamstrings someone with paravermal dysfunction would not be able to walk right flocculonodular controls trunk body posture and eye movements if someone has body posture problems they also have eye movement problems involves rubrospinal tract vestibulospinal tract Anterior love regulates movement of legs dentate nucleus lateral cerebellum fine movement of the hands paravermis intermediate nucleus vermis fastigial nuceus two inputs one output green input inferior cerebellar peduncle spinal cord talks to cerebellum via the inferior cerebellar peduncle incoming info from spinal cord and medulla gold input middle cerebellar peduncle transverse fibers going from pons to nucleus the cortex talks to the cerebellum indirectly cortex sends information down to pontine nuclei in the middle cerebellar peduncle and that s how it communicates to the cerebellum if you had a pontine stroke you would lose input to cerebellum Lecture 13 Almost all sensations go through the thalamus Transmit sensory information to corresponding sensory cortices Receive impulses from cerebellum and basal ganglia Interface with motor frontal lobe Connect to association and limbic cortex Connect to reticular activating system serves as a gateway for incoming sensory information thalamus conveys information from basal ganglia and cerebellum to cortex if you lost your thalamus you d be in a coma if a patient can t stay awake could have a thalamic disorder olfaction doesn t go through the thalamus olfaction goes straight to the cortex Lecture 14 Hypothalamus Each half of the medial hypothalamus can be divided into three parts the supraoptic portion which is farthest anterior and contains the supraoptic suprachiasmatic and paraventricular nuclei the tuberal portion which lies immediately behind the supraoptic portion and contains the ventromedial dorsomedial and arcuate nuclei in addition to the median eminence and the mammillary portion which is the farthest posterior and contains the posterior nucleus and several mammillary nuclei Functions of the Hypothalamus Autonomic nervous system regulation Hormone production regulation Circadian rhythm regulation Limbic system interaction Survival Temp regulation Hunger thirst