Chapter 12 Discussion Questions

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1. Name each of the three primary embryonic brain vesicles. Use clinical terminology to name the resulting adult brain region. Prosencephalon (forebrain) - becomes telencephalon (endbrain) and diencephalon (interbrain) Mesencephalon (midbrain) - remains undividedd

Rhombencephalon (hindbrain) - becomes metencephalon (afterbrain) and myelencephalon (spinal brain) 2. What is the advantage of having a cerebrum that is highly convoluted? What term is used to indicate its crooves? Its outward folds? What groove divides the crebrum into two hemispheres? What divides the parietal from the frontal lobe? The parietal from the temporal lobe? Convoluted cerebrum allows more neurons to occupy the limited space ridges are called gyri

shallow grooves are called sulci and deeper grooves are called fissures longitudinal fissure - separates cerebral hemispheres
central sulcus - separates frontal and parietal lobes
lateral sulcus - separates parietal and temporal lobe
3. What is the function of the basal nuclei? What basal nuclei form the lentiform nucleus? Which arches over the diencephalon? Function - receive input from entire cerebral cortex, other subcortical nuclei, and each other; influences muscle movements and motor control; play a part in cognition and attention; starting, stopping, and monitoring the intensity of movements executed by the cortex, especially those that are relatively or stereotyped; inhibit antagonistic or unnecessary movements; input necessary for performing several activities at once putamen and globus pallidus form lentiform nucleus

caudate nucleus arches over diencephalon
4. Describe the role of the cerebellum in maintaining smooth, coordinated skeletal muscle activity. processes inputs received from cerebral motor cortex, various brain stem nuclei, and sensory receptors; provides precise timing and appropriate patterns of skeletal muscle contraction for smooth, coordinated movements and agility 5. Where is the limbic system located? What...
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