3143331
Spinal Cord (CNS)
- Blood Supply
- Vertebral Arteries
- Anterior Spinal Artery (1)
- Posterior Spinal Arteries (2)
- Anterior Spinal Artery (1)
- Segmented Medullary Arteries
- Fuses with Spinal Arteries
- Artery of Adamkiewicz/ Great
Anterior Segmental Artery
- Blood Supply to
Lower Lumbar and
Sacral Region
- Blood Supply to
Lower Lumbar and
Sacral Region
- Fuses with Spinal Arteries
- Radicular Arteries
- Doesn't Fuse w/ Spinal Arteries
- Doesn't Fuse w/ Spinal Arteries
- Internal Vertebral
Venous Plexus
- Often an avenue of
prostate cancer
metastisis
- Located in
Epidural
Fat
- Often an avenue of
prostate cancer
metastisis
- Vertebral Arteries
- Location (2/3 of Vertebral Canal)
- From medulla oblongata
- To Conus Medularis
(Tapers Between LV1-LV2)
- To Conus Medularis
(Tapers Between LV1-LV2)
- From medulla oblongata
- Unique traits
- Large Sensory and Motor Inputs=
Cervical Enlargement @ C4-T1
Lumbar Enlargement @ T11-L1
- Large Sensory and Motor Inputs=
Cervical Enlargement @ C4-T1
Lumbar Enlargement @ T11-L1
- COMPOSTITION
- Gray Matter (nerve cell bodies)-
Non-myelinated,
inner
- Meninges Covering
- Dura (touch, fibrous
connective tissue)
- Arachnoid
- Subdural Space (extends
to SV2) on Superior;
Subarachnoid Space
Inferior (Location of CSF)
- Subdural Space (extends
to SV2) on Superior;
Subarachnoid Space
Inferior (Location of CSF)
- Pia (intimately
connected to
spinal tissue)
- Denticulate Ligaments (21 Pair)
- Laterally Anchors Spinal Cord in Subarachnoid Space
Transverses Dorsal and Ventral Nerve
Roots; Runs From Pia to the Dura
- Laterally Anchors Spinal Cord in Subarachnoid Space
Transverses Dorsal and Ventral Nerve
Roots; Runs From Pia to the Dura
- Filum Terminale
- LV2-SV2; inferior prolongation of pia
Blends with dura and continues
inferiorly to attach to coccyx =
coccygeal ligament
- LV2-SV2; inferior prolongation of pia
Blends with dura and continues
inferiorly to attach to coccyx =
coccygeal ligament
- Denticulate Ligaments (21 Pair)
- Dura (touch, fibrous
connective tissue)
- White Matter (Axons)-
myelinated, outer
- Gray Matter (nerve cell bodies)-
Non-myelinated,
inner
- SPINAL NERVES
(31 PAIRS)
- Union of Doral
and Ventral Roots;
Located in
Intervertebral
Foramen
- 8, 12, 5,5,1
- Cauda Equina
- L2-Co1; Dorsal and Ventral Roots of Lumbar and
Sacral S.N. In the subarachnoid space/lumbar
cystern below the conus Floats freely in CSF, not
damaged during LP
- L2-Co1; Dorsal and Ventral Roots of Lumbar and
Sacral S.N. In the subarachnoid space/lumbar
cystern below the conus Floats freely in CSF, not
damaged during LP
- Dermatome- Area of skin
innervated by sensory
fibers from a particular
spinal nerve
- Scleratome- area
of bone innervated
by a single S.N.
Segment
- Myotome- group of
muscles innervated by
motor fibers derived from a
single S.N segment
- Union of Doral
and Ventral Roots;
Located in
Intervertebral
Foramen
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