Cerebral hemisphere. Parietal Frontal Occipital Temporal
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1 Cerebral hemisphere Sulcus / Fissure Central Precental gyrus Postcentral gyrus Lateral (cerebral) Parieto-occipital Cerebral cortex Frontal lobe Parietal lobe Temporal lobe Insula Amygdala Hippocampus Occipital lobe Parietal Frontal Occipital Temporal Intro 1
2 Basal ganglia Coronal view Intro 2
3 Brain: Diencephalon Intro 3
4 Brainstem Midbrain Pons Medulla Intro 4
5 Spinal cord Vertebral canal; Gray matter, White matter Intro 5
6 Dorsal Ventral Intro 6
7 Meninges: covering of the brain tissues Dura Arachnoid Pia Intro 7
8 Arachnoid mater: Subarachnoid space (CSF, arteries) Pia mater Dura Pia Intro 8
9 Dural folds Intro 9
10 CSF circulation Production: Choroid plexuses in ventricles lateral ventricle foramen Monro (interventricular foramen) 3rd ventricle cerebral aqueduct 4th ventricle: Median and Lateral apertures subarachnoid space (cistern) arachnoid granulation superior sagittal sinus Intro 10
11 Lateral ventricle Intro 11
12 Lumbar puncture For CSF in the subarachnoid space Usually at the L 4-5 intervertebral space Intro 12
13 Lumbar puncture Intro 13
14 Cerebral arteries in subarchnoid space Circle of Willis (cerebral circle) Internal carotid artery (ICA) system Anterior cerebral artery (ACA) Middle cerebral artery (MCA) Vertebral artery system Posterior cerebral artery (PCA) Basilar artery Communicating arteries: anterior (Acom), posterior (Pcom) Intro 14
15 Intro 15
16 Peripheral Nervous system Spinal nerves 31 pairs: Cervical (C, 8), Thoracic (T, 12), Lumbar (L, 5), Sacral (S, 5), Coccyx (Cx, 1) Cranial nerves 12 pairs [Cr N. I & Cr N. II: considered as CNS extension] Contents General Motor / Sensory nerves Autonomic nerves (Visceral components) Intro 16
17 Intro 17
18 Spinal nerves: functional components A spinal nerve contains Ventral (anterior) roots Motor fibers from motor neurons in anterior horn Dorsal (Posterior) roots Sensory fibers from spinal ganglion to dorsal horn To become a Mixed spinal nerves: Dorsal (posterior) ramus to vertebral column & back Ventral (anterior) ramus trunk (ant. & lat.), upper & lower limbs Intro 18
19 Intro 19
20 Intro 20
21 Territory of innervation Spinal nerves Dermatome: skin innervation Myotome: muscle innervation Peripheral: combination of various dermatome + myotome Intro 21
22 Autonomic nervous system (ANS) Visceral motor system Sympathetic (thoracolumbar) division Parasympathetic (craniosacral) division Organization 1 st preganglionic neurons (inside CNS) Sympathetic: intermediate column of spinal cord Parasympathetic: brainstem 2 nd postganglionic neurons (outside CNS) i.e. autonomic ganglion Post-ganglionic fibers: terminating on effectors (smooth muscles, cardiac muscles, glands) Intro 22
23 ANS: organization Intro 23
24 Sympathetic division Presynpatic neurons Intermediate cell column (lateral horn) T1-L2/3 (Thoracolumbar) Postsynpatic neurons Sympathic trunk, Paravertebral ganglia; Prevertebral ganglia Intro 24
25 Parasympathetic division Cranial parasympathetic outflow Gray mater of brainstem cranial nerves 3, 7, 9, 10 Sacral parasympathetic outflow Gray mater of spinal cord (S2-4) ventral roots of S2-4, ventral rami, pelvic splanchnic nerves Intro 25
26 Functions of ANS: Principles Sympathetic: catabolic, flee or fight Sympathetic fibers to all vascularized tissues Parasympathetic: anabolic, conserving Gland secretion (except sweat glands): parasympathetically stimulated Vasoconstriction (except coronary arteries): sympathetically stimulated Intro 26
27 CNS: review Organization Cerebral hemisphere Brainstem, Cerebellum Meninges Dura, Arachnoid, Pia Ventricular system and Cerebrospinal fluid Cerebral arteries: Willis circle Intro 27
28 PNS: Review Structure of PNS Somatic vs. Autonomic fibers Ventral vs. Dorsal roots; Ventral vs. Dorsal rami Dermatome, Myotome Autonomic nerves Organization Presynaptic neurons, Postsynaptic ganglion Sympathetic vs. Parasympathetic nerves Intro 28
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