Term
| Where is the most white matter in the spinal cord? |
|
Definition
| Sacral level least absolute and relative amount. Upper cervical most absolute and relative amount. |
|
|
Term
| Describe the basic structure of the spinal cord. |
|
Definition
| posterior medial sulcus, anterior medial fissure, grey (internal) and white matter(external). |
|
|
Term
|
Definition
| enlargement of the central canal |
|
|
Term
|
Definition
|
|
Term
| Name the columns that the white matter is divided into and where they are located. |
|
Definition
| posterior, lateral and ventral column. |
|
|
Term
| Name the columns that the white matter is divided into and where they are located. |
|
Definition
| posterior, lateral and ventral column. |
|
|
Term
| Name the posterior column from sacral to T6 |
|
Definition
|
|
Term
| Name the white matter from T6 to cervical |
|
Definition
| Fasciulus cuneatie(large) and fasciculus gracilus |
|
|
Term
| what is the dorsal lateral tract of Lissauer? |
|
Definition
| Small white matter that covers the dorsal horn tip at the surface of the cord; contains bifurcating pain and temperature fibers |
|
|
Term
| What is the propriospinal tract |
|
Definition
| a thin white layer that suurounds the gray matter like a border and carries fibers interconnecting segments |
|
|
Term
| What is the grey matter composed of? |
|
Definition
| smaller dorsal horn and larger ventral horn. |
|
|
Term
| How many laminae are in the dorsal horn? |
|
Definition
laminae I-VI sensory only
I-marginal zone
II-substantia gelatinosa (pain and T)
III and IV-nucleus proprius
V and VI- base of dorsal horn. |
|
|
Term
| Name the laminae and fx of ventral horn |
|
Definition
| VIII and IX are functionally related. VIII contains interneurons and IX contains alpha and gamma motor neurons and is discontinuous throughout ventral horn |
|
|
Term
| what is the motor tract in the ventral column? |
|
Definition
| ventral corticospinal tract |
|
|
Term
| what connects the right and left anterior columns? |
|
Definition
|
|
Term
| what is the motor tract in the lateral funiculi? |
|
Definition
| lateral corticospinal tract |
|
|
Term
|
Definition
| carrying info to the cerebellum, lateral edge of lateral funiculi |
|
|
Term
|
Definition
| pain and temperature sensory tract; medial and ventral to spinocerebellar tract |
|
|
Term
| what is laminae VII and what does it contain |
|
Definition
| it is intermediate gray matter and it contains clark's nucleus (dorsal spinocerebellar tract L2-C8) and preganglionic cell bodies of sympathetic fibers between T1-L2 |
|
|
Term
|
Definition
| bulge of sympathetic preganglionic cell bodies in Laminae VII of gray matter |
|
|
Term
| where are the nucleii for the spinal accessory nerve? |
|
Definition
|
|
Term
| where are the nucleii for the phrenic nerve? |
|
Definition
|
|
Term
| where are the nuclei for motor neurons of the cervical and brachial plexus? |
|
Definition
C5-T1 ventral horn
L2-S3 ventral horn |
|
|
Term
| what is Onuf's nucleus and where is it? |
|
Definition
| the nucleus for urethral and anal voluntary sphincter's, S2-S4 ventral horn |
|
|
Term
|
Definition
| around the lateral margins of the spinal cord from both anterior and posterior spinal arteries |
|
|
Term
|
Definition
| from the anterior spinal artery, gives blood to the ventral horn, most of dorsal horn and inner part of lateral column |
|
|
Term
|
Definition
| from thoracic arteries, coming in through the intervertebral foramen |
|
|
Term
| posterior spinal arteries |
|
Definition
| bilateral, tips of dorsal horn and dorsal columns |
|
|
Term
| occlusion of anterior spinal arteries |
|
Definition
cervical or lumbar enlargemtnt --> paralysis of limbs
upper cervicals --> death via phrenic anorexia
sacral level --> Onuf's/loss of bowel control |
|
|
Term
| occlusion of posterior spinal artery produces unilateral affect |
|
Definition
| sensory loss and reflex function |
|
|
