Spinal canal

spinal cord and spinal nerves 2

• Report rights infringement
• published: 03 Sep 2016
• views: 13

first enlargment in cervical department is insencerrvicalis in servical department it larger in cervical department and in lumber and sacral department second enlargment why lumbar and cervical department has enlargment because this department take place in movement of extremity cirvical department it correspond it innervete muscle of upper extremity lumber and sacral deparment supply muscle of lower extremity that is whyin cervical and lumber department two enlargment cervical and lumber lower part of spinal cord has conical shape and has name conus medularis from this start filum terminalis that is continuation od meninges and it attach at the level of 2 cocegeal vertebra but spinal cord finish at the level of lumber lower border of second vertebra .that is vertebral colum and u rember that vertebral colum how many cervical 7 thoracic12 lumber 5 and sacral 5 vertebra and three coccegeal vertenra also fuse one bone of cotis and it is fifth fourth and third that is second lumber vertebra and here it is at the level of lower border of second lumber vertebra where spinal cord finish below only filum terminale that is why sometime necessary to perform punture of vertebral canal why we need todo this manipulation to receive cerebral spinal fluid or sometime insert in time of anesthesia epidural anesthesia necessary to insert in to the spinal canal and we perform this manipulation between spinal process of third or fourth or some time between fourth and fifth lumber vertebra why if we insert pinsert in this place impossible to destro spinal cord because spinal cord is absent in childhood level of spinal cord at the level of third lumber vertebra in adult lower border of second lumber vertebra fom spinal cord start roots of spinal nerves if we cut spinal cord we willse this picture anterior surface here it is poterior and anterior surface of spinal cord we can see deep fossure fissura mediana anterior and poteriorly not so deep groove sulcus medianus posterior next it is roots of spinal nerves that is anterior root radix anterior and poterior root radix posterior and posterir root has enlargment and name is ganglion spinalis spinal ganglion and this root join together and form spinal nerve trunk of spinal nerve truncus nerves spinalis place where anterior root leave spinal cord it is anterior lateral groove sulculus anteriolateralis and place where poterior root pass has name posterior lateral groove sulcus potralateralis andlast movement here it is small groove and name of this groove sulcus intermedious poterior that is external structure of spinal cord and this side we have same we have roots of spinal nerves join together and formed trunk of spinal nerve there no space i draw it here truncus spinal cord how many spinal nerves start from spinal cord 31 nerves and this nerves leave vertebral colum through opening what is the name of this opening foramen intervertebrale and how many cervical nerve 8 and how many vertebra 7 but first spinal nerve pass between skull between occipital bone and first cervical vertebra between atlas and occipital bone and another 7 nerves pass between corresponding vertebra clear how many thoracic nerves twelve nerve eight cervical nerve five lumbar five sacral and one coccegeal nerves thirty one nerves arise from spinal cord and thiry one segment we divide spinal cord one spinal cord segment that is vertical part of spinal cord with one pair of spinal nerves thirty one segments and thirty one segment of thirty one nerves and we study spinal cord finishat the level of lumbar two and we have five saccral and one cocceageal vertebra and this nerve rise from spinal cord and dicend vertebral canal and leave vertebral canal through correspond opening come here it is we remove arches if vertebral canal and we continue vertebral canaland here it is spinal cord that is place where apinal cord is finished conus medularis and continuation of conus medularus only meningus filum terminale and here it is spinal nerves thats is cervical thoracic lumbar and we can see that lumbar third fourth fifth ...they desend to in vertebral canal together with filum terminale filum terminale in central part lateraly it roots of spinal nerves decend in vertebral canal that is why if we insert the neddle between third and fourth lumbar vertebra into vertebral canal there is impossible to destro the spinal cord but we can insert neddle in to rootof spinal nerve and what we receive that is not a problem your patient feeling like s