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Unit 4 Lab 1 A&P 242 Brain and Spinal Cord G Blevins/G Brady Winter 2006 Human Brain Structures: Primary Embryonic structures: Prosencephalon Mesencephalon Rhombencephalon Secondary Embryonic structures: Telencephalon Diencephalon Metencephalon Myelencephalon Mesencephalon Cerebral Meninges: Dura mater (*) Pia mater (*) Subarachnoid space (*) Arachnoid mater (*) Cerebral Hemisphere Lobes: Frontal (*) Parietal (*) Temporal (*) Insula Occipital (*) Cerebral Hemisphere Grooves and Ridges: Longitudinal Fissure (*) Precentral Gyrus Postcentral Gyrus Parieto-occipital groove Gyrus (*) Sulcus (*) Central sulcus Lateral sulcus Cerebral Hemisphere Surface Anatomy: Cerebellum (*) Corpora Quadrigemina (*) Inferior Colliculus (*) Medulla Oblongata(*) Cerebral Peduncles (*) Olfactory Bulb (*) Pituitary (Hyopophysis) (*) Infundibulum (*) Cerebral Peduncles (*) Superior Colliculus (*) Pons (*) Olfactory Tract (*) Mammillary Body (*) Cerebral Hemispheres Functional areas: Motor Association (pre)motor area Somatosensory Association area Visual Association area Auditory Association area Primary motor Primary Somatosensory area Primary Visual area Primary Auditory area Internal Anatomy of the brain: Corpus Callosum (*) Intermediate Mass (*) Pineal gland (*) Septum Pellucidum (*) Thalamus (*) Arbor Vitae (*) Fornix (*) Hypothalamus (*) Folia (*) Structures Involved with Cerebrospinal fluid: Choroid Plexuses Third ventricle (*) Lateral apertures Arachnoid Villi Lateral ventricles (*) cerebral aqueduct (*) median apertures Superior sagittal sinus Interventricular Foramen Fourth ventricle (*) Subarachnoid space (*) Cranial Nerves: (see detail on next pages) (1) Olfactory (*) (4) Troclear (7) Facial (10) Vagus (2) Optic (*) (5) Trigeminal(*) (8) Vestibularcochlear (11) Spinal Accessory (3) Oculomtor (*) (6) Abducens (9) Glossopharyngeal (12) Hypoglossal Arachnoid mater Subarachnoid space Spinal Cord Menings: Dura mater Pia mater External Anatomy of Spinal Cord: Ventral root Doral root Doral root ganglion Internal Anatomy of Spinal Cord: Ventral horn Dorsal Gray commissure Posterior column Anterior Median Fissure Doral horn Ventral gray commissure Lateral column Posterior Median Sulcus Lateral horn Central canal Anterior column Organization of tissue in Brain and Spinal Cord: White Matter – Nerve fibers, Myelin Sheath, Neuroglia nuclei Gary Matter - Motor neuron cell bodies, nerve fibers, Neuroglia nuclei Spinal Nerve Plexuses: Cervical Brachical Lumbar Sacral Axillary Genitofemoral Pudendal Ulnar femoral Median Sciatic Spinal Nerves: Phrenic Radial Peroneal Skull Review: Internal acoustic meatus Cribriform plate Foramen rotundum Jugular foramen chiasmatic groove Olfactory foramen Foramen Ovale Hypoglossal canal Optic foramen Superior Orbital Fissure Internal Acoustic meatus Foramen magnum Muscles to review: Sternocleidomastoid Diaphragam Triceps branchii Trapezius Genioglossus Deltoid Teres minor Flexor Carpi Ulnaris (*) = Structures to be observed on the Sheep brain. Styloglossus Cremester