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Presentation on theme: " http://www.studentconsult.com Sign in: e-mail: ihui_lee@hotmail.com password: ihuilee."— Presentation transcript:

1   Sign in: password: ihuilee

2 Gross Neuroanatomy

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5 CNS vs PNS

6 Neuroanatomy CNS Nuclei (gray matter) vs. nerve tracts (white matter) Brain, functional areas Spinal cord Blood-brain barrier Ventricular system Blood supply PNS Cranial, cervical to sacral nerves, autonomic nerves muscles

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10 Methods Lesion studies Special stains (Golgi, Nissel) and histology
Tract tracing Surface-, Intracortical microstimulation PET, (f)MRI, EEG, MEG, TMS

11 Phineas Gage--1848

12 Neurons are signaling elements
Late nineteenth century: Golgi and Ramon y Cajal

13 Mapping brain regions Wilder Penfield, 1940’s
Electrical stimulation of exposed human cortex during surgery

14 Methods for functional studies

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16 Limbic lobe

17 Cranial nerves

18 Diencephalon and brainstem

19 C-shaped structures

20 Somatotopic mapping of human sensory and motor cortices

21 CNS subdivision

22 Brain: gray and white matter

23 Diencephalon Thalamus major sensory center and motor output
Corpus callosum links 2 hemispheres Hypothalamus major center for homeostasis

24 Thalamus All senses, except olfaction, are routed through it to cortex

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26 Limbic system emotion, memory, and learning

27 Brainstem midbrain, pons, medulla

28 Brainstem Tectum: Superior colliculus: part of vision
Inferior colliculus: part of audition Periaqueductal gray area Tegmentum: Reticular Formation: sleep, arousal, muscle tone contain norepinephrine nuclei Substantia Nigra: motor system (Parkinson’s dis) contain major dopamine nuclei Periaqueductal gray area: contain Substance P nuclei sensitive to opiates

29 Spinal cord

30 Blood-brain barrier endothelial cells (tight junctions in-between), pericytes, and astrocytes (end-foot processes)

31 Motor corticospinal rubrospinal reticulospinal tracts

32 Motor multiple descending tracts from brainstem

33 Spinal Cord spinal reflex; central pattern generators at C-, L-enlargement

34 Motor the motor unit

35 Motor extrapyramidal system (basal ganglion)

36 Functions of Basal ganglion: other than motor control

37 Sensory Dermatomes

38 Somatosensory spinothalamic tract

39 Somatosensory proprioception dorsal column pathway

40 Somatosensory pain modulatory pathways

41 Autonomic

42 Autonomic Hypothalamic nucleus


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