Spinal Cord Anatomy PDF

Spinal cord LO understand the relationshipbetween ertebrae spinalcord spinalnerves dorsal ventral dorsalrootlets describe maintypes ofneuronesassociated with the spinalcord wheretheircellbodiesare located where their axonproject outline characteristic types functions of n...

Spinal cord LO understand the relationshipbetween ertebrae spinalcord spinalnerves dorsal ventral dorsalrootlets describe maintypes ofneuronesassociated with the spinalcord wheretheircellbodiesare located where their axonproject outline characteristic types functions of neurones in diff laminae of spinalcordgray matter describe the shape of thespinalcordalong its rostral caudal axis explain the changing shape of greymatter and changingratio of white to graymatter alongthis axis give an account of the caudaequina lumbar cistern give an overview of ascending spinothalamic dorsal column spinocerebellar pathways descendingpyramidalmotorpathway outline the loss ofmotorfunctionresulting from lesions of the spinalcord at diff rostral caudal levels transversesection ofspinalnerve dorsalrootganglion containscell lateral pseudoipso bodiesof sensory 2axonswhich neurones entersandexits zFÉÉÉ spinalcord enters via dorsalhorn synapses with otherneurones foundinventral afins travel fromspinal nerve to skeletal muscle Humanshave 32 or 33 vetebrae subdivided into I spinalcordis protectedwithin thevertebral column madefrom bones ventralpartof vertebralcolumn is the vertebralbody bothjoinedbysmallbonecalled dorsalpart of vertebral columnis the vertebral arch pedalle toppart of dorsalpartis spinousprocess belowdorsalroot found Wheremusclesattach ganglion surroundedby 3 meninges layer 1 dorsal toughfibrouslayeroffersprotection 2 arachnoid finer subarachnoid 3 pia extremely fine wrappedaroundtightly space between arachnoid and pia contains CSF and smallbloodvessels above meninges is epidural spacecontaining small veins fat  next coveredin lecture dorsalroots subdivide intodorsalrootlets whichcarrysensoryaxonsintospinalcord ventralrootmergeswithdorsalroot to form spinalnerves longitudinal section of spinalcord carryaxonsofmotorand sympatheticneuronesfromspina cord  rootlets form roots roots form the nerves dorsalroots have dorsal root ganglion ventral roots are NOT associated with the ganglion spinalnervesubdividesinto part of sympathetic nervous system Lumbarregion sung teeth ost efinedin horacic region  thanthoracicregion fattier controlsarm failsafe ia umn enlargedsubarachnoidspa forpainreliefduringgivingbirth nodamagetospinalcordsinceit'sended can analyse cs F for signsofinfection mainlywhitematter lessascendingordescending tracts mostlymadeofgraymatter  knowwhere ourlimbsare in space of descided goesfromreticularnucleifromhindbraintospinalcord fromvestibularnucleiinhindbrainto spinalcord neuronesinthisnucleus are arrangedaccording to map of body 3 neurone relay smalldiameter nociceptive DRG neurone  projected to 3 neurone relay branchesinventralhornbutmain branchtravels up i mama no V  a neurone relay painful Soma cellbody  organandbodysensoryDRG Function of motor neurones  controlofskeletalmuscles regulation of smoothmusclesby sympathetic or parasympathetic N S sympathetic parasympathetic lesions in upper area of spinalcord but affectspecificfunctions of area parasympatheticandorskeletalmuscle canalsocauseimpairments below