SPINAL CORD, SPINAL NERVES, EYE AND EAR ANATOMY. Learning Objectives Identify structures of the spinal cord, both gross anatomical structures and cross.

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  • SPINAL CORD, SPINAL NERVES, EYE AND EAR ANATOMY

  • Learning ObjectivesIdentify structures of the spinal cord, both gross anatomical structures and cross sectional structures.Identify meninges and spaces around the spinal cord.Identify major peripheral nerves and nerve plexuses.Identify the accessory and internal structures of the eye, and explain their function.Describe the structures of the external and middle ear and explain how they function.

  • Gross anatomy of the spinal cord

  • Cross-sectional anatomy of the spinal cord

  • Cross-sectional anatomy of the spinal cord

  • Spinal Nerves: RootsFigure 13.7a

  • The Meninges

  • Spinal NervesFigure 13.6

  • Nerve PlexusesAll ventral rami except T2-T12 form interlacing nerve networks called plexusesPlexuses are found in the cervical, brachial, lumbar, and sacral regionsEach resulting branch of a plexus contains fibers from several spinal nerves

  • Cervical PlexusFigure 13.8

  • Brachial PlexusFigure 13.9a

  • Figure 13.9cBrachial Plexus: Distribution of Nerves

  • Figure 13.7bSpinal Nerve Innervation: Back, Anterolateral Thorax, and Abdominal Wall

  • Lumbar PlexusFigure 13.10

  • Sacral PlexusFigure 13.11

  • Eternal Features and Accessory Structures of the Eye

  • The eyeConjunctiva covers most of eyeCornea is transparent anterior portion

    Three layersOuter fibrous tunicSclera, cornea, limbusMiddle vascular tunicIris, ciliary body, choroidInner nervous tunicRetina

  • The Sectional Anatomy of the Eye

  • Cow eye: External and internal anatomy

  • The Sectional Anatomy of the Eye

  • The Anatomy of the Ear

  • The Middle Ear

  • The Inner Ear

  • The Organ Of Corti

  • Histology of the cochlea

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