Spinal Cord Flashcards
Spinal cord begin at ?
Upper border of atlas vertebra
Spinal cord is ββββ- shape , βββ-cm length & ββββgram weight ?
Cylindrical , 45 cm , 30 gram
Spinal cord end at disc between ββ-& βββ- ββββ- vertebrae?
1&2 lumbar
Lower spinal cord conical shape is called ?
Conus medullaris
Lower tapering end βββββ- descends to attach to back of ββ-?
Filum terminale , coccyx
Lower ββ-& ββ nerve descends in subarachnoid space to reach foramina forming βββββββ?
Lumbar & sacral nerves. , forming cauda equina
Cervical enlargement extend from βββtoββ- ?
3 cervical to 2 thoracic
Nerves arising from cervical enlargement βββββ-of ββlimb ?
Brachial plexus nerves of upper limb
ΨΨͺΩ ΩΩ Ψ¬Ψ§ Ψ³ΩΨ§Ω Ψ§Ψ΄ Ψ³Ψ¨Ψ¨ enlargment Ψ±Ψ§Ψ ΩΩΩΩ ΩΩΨ³ Ψ¬ΩΨ§Ψ¨
Lumbar enlargement extend from βββ-toβββ- ?
1 lumbar to 3 sacral
Nerves arising from lumbar enlargement ββββ&βββ-of ββlimb ?
ΨΨͺΩ ΩΩ Ψ¬Ψ§ Ψ³ΩΨ§Ω Ψ§Ψ΄ Ψ³Ψ¨Ψ¨ enlargment Ψ±Ψ§Ψ ΩΩΩΩ ΩΩΨ³ Ψ¬ΩΨ§Ψ¨
Lumbar & sacral plexus nerves of lower limb
6 longitudinal sulci in spinal cord ?
1- anterior median fissure
2- posterior median sulcus
3- anterolateral sulci Rt & Lt
4- posterolateral sulci Rt &Lt
anterior median fissure of spinal cord lodgesββββββ artery ?
anterior spinal
anterolateral sulci Rt & Lt & posterolateral sulci Rt &Lt. are for ββ&βββ- of spinal nerves ?
Ventral & dorsal roots
Spinal cord covering ?
- dura mater
- arachnoid mater
- pia mater
Dura of spinal cord has βββ layer ?
One layer
Dura & arachnoid mater of spinal cord end at level ββ?
S2
Spinal cord is held in place Ψ§Ψ΄ Ω Ψ«Ψ¨ΨͺΩ ?
- filum terminale & denticulate ligament
Pia mater of spinal cord end at level ββ & completes ΨͺΩΩ Ω as ?
L1 , filum terminale
Epidural space is between?
Vertebrae & dura
Subdural space is between ?
Dura & arachnoid
Subarachnoid space is between?
Pia & arachnoid contain CSF
Extension of spinal pia mater is between ββ&ββ- roots they attach to βββ?
Sensory & motor , dura
Lumbar puncture between βββββ why is it used (2) ?
L2,3
- CSF sample
- inject anesthetic
Spinal Motor root attached to βββββββ- ?
Anterolateral sulcus
Spinal sensory root attached to βββββββ- ?
Posterolateral sulcus
Motor & sensory root pierce βββ-& fuse at ββββββββ to form = ββββββββββ-?
Dura mater , fuse intervertebral foramen to form = spinal nerve trunk
Spinal nerve trunk divides into ? (2)
- anterior primary ramus
- posterior primary ramus
Internal structure of spinal cord (3) ?
1) central canal
2) gray matter
3) white matter
Central canal of spinal cord is lined byβββββ & contain βββ?
Ependyma & contain CSF
Gary mater of spinal cord is ?
H-shape :
- 2 ventral horns (motor nuclei )
- 2 dorsal horns (sensory nuclei )
- 2 lateral horns (thoracic region. Sympathetic nuclei )
White matter of Spinal cord surrounds ββ forms ββββ- & divide into?
Gary matter , long ascending & descending tract , 3 funiculi (anterior-lateral -posterior)
Blood supply of spine ?
Anterior spinal artery
Posterior spinal artery
Segmental spinal artery
Anterior spinal artery formed by union ββββββ-?
2 arteries from vertebral A inside skull
Anterior spinal artery descends ββββββ-?
Within anterior median fissure ( anterior surface of spine )
Anterior spinal artery supply ββββββ-?
Anterior 2/3 old spinal cord
Posterior spinal arteries arise ?
Either
Directly : form vertebral A inside skull
Indirectly : from posterior inferior cerebral arteries PICA
Posterior spinal arteries descendsββββ- surface of spine ?
Posterior
Posterior spinal arteries supplies ?
Posterior 1/3 of spinal cord
Segmental spinal arteries branches of ?
Arteries outside the vertebral column
Each Segmental spinal artery give rise to ?
Anterior & posterior radicular A accompanies anterior & posterior nerve to spinal cord
