Term
| True or false: the "horns" consist of white matter (myelinated axons) |
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Definition
False- the horns are gray matter (cell bodies)
"Columns" consist of white matter |
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Term
| Which section of the spinal cord is grossly the largest? |
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Definition
| Cervical (innervates & receives sensation from upper limb- very important in humans) |
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Term
| Which section of the spinal cord has the smallest amount of gray matter (smallest size horns)? |
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Definition
| Thoracic- the trunk surface requires relatively little innervation |
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Term
| Which has a larger amount of gray matter (greater size horns): lumbar or sacral spinal cord? |
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Definition
| Sacral (supplies innervation to lower limb) |
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Term
| What is the significance of the lateral horn of the thoracic spinal cord? |
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Definition
| Preganglionic sympathetic cell bodies |
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Term
| Relative location of cell bodies that innervate the quadriceps in the ventral horn? |
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Definition
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Term
| Relative location of cell bodies that innervate adductors in the ventral horn? |
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Definition
| Central (think "proximal muscles") |
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Term
| T/F: Ventral horn cells are organized into nuclei based on the muscles they supply |
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Definition
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Term
| What are the primary sensation functions of the dorsolateral (dorsal column) system? |
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Definition
| Joint position, discriminative touch, vibration |
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Term
| What are the primary functions of the spinothalamic system? |
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Definition
| Pain, temperature, diffuse touch |
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Term
| What is the primary function of the spinocerebellar tract? |
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Definition
| Muscle length (from muscle spindles) & tendon tension (Golgi tendon organs) |
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Term
| 2 divisions of the dorsolateral system and their functions? |
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Definition
Gracile fasciculus (medial)- carries information from lower trunk/lower extremity
Cuneate fasciculus (more lateral)- carries info from upper trunk/upper extremity |
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Term
| Relative location of spinocerebellar tract on spinal cord cross section? |
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Definition
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Term
| Relative location of spinothalamic tract on spinal cord cross section? |
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Definition
| AKA anterolateral tract- located just medial to ventral spinocerebellar tract |
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Term
| What is the function of the reticulospinal and vestibulospinal tracts? |
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Definition
| Bilateral motor control of trunk/postural muscles to regulate balance & gait |
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Term
| Relative location of corticospinal tract on spinal cord cross section? |
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Definition
| Medial to dorsal spinocerebellar tract |
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Term
| Relative location of reticulo-/vestibulospinal tracts on spinal cord cross section? |
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Definition
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Term
| Segmental spinal arteries follow what route to supply the spinal cord? |
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Definition
| Follow the nerves and branch into anterior/posterior radicular arteries to follow the ventral/dorsal roots, respectively |
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Term
| T/F: cervical SC supplied by branches of vertebral artery |
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Definition
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Term
| Is the corticospinal tract supplied by the anterior or posterior spinal artery? |
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Definition
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Term
| Is the gray matter supplied by the anterior or posterior spinal artery? |
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Definition
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Term
| Is the spinocerebellar tract supplied by the anterior or posterior spinal artery? |
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Definition
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Term
| At approximately what spinal level does the spinal cord end (conus medullaris begin)? |
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Definition
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Term
| Where should a lumbar puncture safely be performed? |
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Definition
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