WEEK 10/2 > SPINAL CORD Flashcards
SPINAL CORD GENERAL FEATURES
- part of CNS
- Has part of the peripheral nervous system attached to it including most of somatic motor and sensory system
- part of visceral sensory system
- sympathetic part of the visceral motor system
- parasympathetic part of the visceral motor system
LOCATION OF SPINAL CORD
- lies within vertebral canal inside the vertebral column extending from the foramen magnum/C1 rootlets superiorly above LV1 or LV2
WHERE IS THE SPINAL CORD ENLARGED
- in the cervical and lumbosacral region
WHAT IS THE MOST NARROW PART CALLED
- the most narrow part is caudal
called > conus medullaris
WHAT DOES THE SPINAL CORD ATTACH TO
- conus and extending through the lumbar cistern to the lower dura
WHAT IS THE STRAND OF SPINAL CORD IN THE COCYX CALLED
- a strand of pia
- fillum terminalis
WHAT IS LOCATED LATERALLY ALONG THE SPINAL CORD
- subarachnoid spacee
WHAT IS THE SPINAL CORD SURROUNDED WITH
- three meninges
pia > arachnoid > subarachnoid containing CSF
WHAT IS BETWEEN THE OUTER LAYER OF MENINGES AND THE WALL OF VERTEBRAL CANAL
- epidural space which contains veins and adipose tissue
HOW MANY ATTACHMENTS TO THE SPINAL CORD
- 32 pairs of spinal nerves
- 8 cervical
- 12 thoracic
- 5 lumbar
- 5 sacral
- 2/3 coccygeal
WHAT IS INCLUDED IN THE PROXIMAL PART OF THE SPINAL CORD NERVES
- dorsal and ventral roots
WHERE DOES THE SPINAL CORD EXIT FROM
- exits the vertebral canal via the intervertebral foramen
ARE THE ROOTS SHORT IN THE CERVICAL VERTEBRAL REGION
yes and horizontal
ARE THE ROOTS LONG AND VERTICAL IN THE SACRAL VERTEBRAL REGIONS
yes
WHAT IS THE COLLECTION OF DORSAL AND VENTRAL ROOTS at the lower term named
CAUDA EQUINA
WHERE DO THE NERVES EXIT FROM IN THE SACRAL REGION
- as anterior and posterior primary ramus through the anterior and posterior sacral foramina
MENINGES
HOW MANY LAYERS IS THE MENINGES COMPOSED OF
three
NAME THE THREE LAYERS OF MENINGES
- deep to superficial
pia > arachnoid > dura
BETWEEN THE ARACHNOID AND PIA IS WHAT
- subarachnoid space which contains CSF
WHERE IS THE CSF FORMED
- within the ventricles of the brain and enters the subarachnoid space via three foramina located beneath the cerebellum
WHERE IS THE CSF FLUID PARTLY RESBORBED
into the venous system via the cerebral venous sinuses
PIA MATER - AHDERES TO
- surface of the spinal cord and with the arachnoid helps form the dentate ligaments
ARACHNOID MATER - ADHERES TO
- to the dura and with the dura extends to about SV2 level
