Flashcards in Class 1 Deck (54)
Second protective structure after skull/vertebrae.
Layers of meninges
Between dura mater and vertebrae
Contains fat and connective tissue.
Most superficial layer of the meninges
Thick and strong.
Made of dense irregular connective tissue.
Runs from Foramen Magnum to s2
Continuous with epineurum of nerves
Theoretical space between dura mater and arachnoid mater. Contains (minute quantities) of interstitial fluid.
Middle layer of meninges
Loosely arranged collagen and elastic fibres.
Between arachnoid and pia mater b
Deepest, thinnest layer of meninges
Squamous --> cuboidal cells
Contains blood supply to spinal cord.
Thickenings of pia mater.
Fuse with arachnoid and inner dura mater
Anchor spinal cord to vertenbrae
Diameter of spinal cord
Length of spinal cord
Medulla oblongata to superior L2 (in adults; L3-4 in neonates)
Cervical enlargement of spinal cord
C4-T1 (nerves to/from upper limbs)
Lumbar enlargement of spinal cord
T9-12 (nerves to/from lower limbs)
Terminis of spinal cord
Inferior to lumbar enlargment
IVD between L1-2
Anchors spinal cord to coccyx
Extension of pia mater (fused with arachnoid and dura mater)
Inferiorly angled nerves exiting in the space between conus medullaris and end of vertebral column.
* basal ganglia in brain is a nuclei not a ganglion *
Clusters of cell bodies
Bundles of axons.
Small bundle of axons connecting nerve roots to spinal cord.
Larger bundles of axons connecting spinal nerves to segments of cord via rootlets
Posterior (dorsal) root
Axons of sensory neurons.
Dorsal root ganglion
Enlargement containing sensory cell bodies
Ventral (anterior) root
Mostly myelinated bundles of axon sheaths
In Peripheral Nervous system, superficial to grey matter
Unmyelinated axons, neuroglia, dendrites and cell bodies
In PNS deep to white matter
Postior median sulcus
Dent in centre posterior spinal cord.
Connects two halves of spinal cord.