BI302L.Lab_B.Presentation.pdf - BI 302L: Lab B Topic: Brain...

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BI 302L: Lab BTopic: Brain & Cranial NervesB1. Gross Anatomy ofthe Brain & Cranial NervesB2. Sheep Brain DissectionTextbook Material:Chapter 14 (Saladin)Are you wearing appropriate attire?1
B1. Gross Anatomy of the Brain & Cranial NervesObjectives:Identify the major anatomical structures of the human brain.Know the major components of the telencephalon, diencephalon, mesencephalon,metencephalon, and myelencephalon.Understand the structure & location of the meninges.Identify the ventricles and other structures associated with cerebrospinal fluid andknow the pattern of flow of cerebrospinal fluid.Know the cranial fossae of the skull and the respective part of the brain that eachhouses.Know and identify all cranial nerves by name & number (diagrams, models, andcadaver as appropriate); know the foramina by which each cranial nerve exits theskull; and be able to identify foramina on a skull.2
B1. Gross Anatomy of the Brain & Cranial NervesMajor Subdivisions (Encephalons) of the Brain:Telencephalon = CerebrumDiencephalon = Thalamus, Hypothalamus, pituitary gland, Epithalamus (pineal),mammillary bodiesMesencephalon = MidbrainMetencephalon = Pons & CerebellumMyelencephalon = Medulla Oblongata“Brain Stem”: This term is frequently used but is an imprecise term. In humans it is usuallydescribed as including the medulla oblongata (myelencephalon), pons (part ofmetencephalon), and midbrain (mesencephalon). In some definitions the cerebellum andparts of the diencephalon are included. It is never described as including the telencephalon.3
Frontal lobeOccipital lobeCentralsulcusLongitudinal fissureParietal lobeSuperior viewParieto-occipital sulcusFissures:Longitudinal Fissure: separatescerebral hemispheres.Transverse Fissure: separatescerebrum from the cerebellum.Sulci:Sulci (grooves) and gyri (ridges)are found on the surface of thecerebrum.Deeper (named) sulci separatelobes of the cerebrum.B1. Gross Anatomy of the Brain & Cranial Nerves4Fig. 14.1LateralsulcusTransverseFissure
Parieto-occipitalsulcusLateral sulcuspulled apartto expose insula lobeCerebrum (telencephalon):Lobes & sulci, lateral viewB1. Gross Anatomy of the Brain & Cranial Nerves5Fig. 14.13CentralsulcusInsulaTemporal lobeLateral sulcusOccipital lobeParietal lobeFrontal lobe
CorpuscallosumSeptumpellucidumFornixCerebrum:Internal structuresSagittal Section of brainB1. Gross Anatomy of the Brain & Cranial Nerves6Fig. 14.2Parieto-occipitalsulcusBrain:Gray matterWhite matterFig. 14.5
B1. Gross Anatomy of the Brain & Cranial Nerves7Frontal lobeTemporal lobeInfundibulumPonsMedullaoblongataCerebellumSpinal cordExternal Structures:On Inferior Surface of Brain.Mammillary bodies are thepredominant feature of thediencephalon visible inferiorly.

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Term
Winter
Professor
Weatherwax
Tags
Anatomy, Lateral ventricles, fourth ventricle, third ventricle

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