Quiz #7 Flashcards Preview

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Flashcards in Quiz #7 Deck (10)
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Lateral Corticospinal Tract

- originates in the motor cortex of the frontal lobe
- decussates (changes sides) at the lower medulla-spinal cord juncture
- inputs along the spinal cord at the ventral horns
- responsible for contralateral movement of the body


Anterior Corticospinal Tract

- originates in the motor and premotor areas of the frontal lobe
- courses ipsilateral down the spinal cord
- inputs at the ventral horn
- controls trunk muscles


Rubrospinal Tract

- originates in the midbrain
- decussates at the midbrain
- courses down the brainstem and spinal cord
- inputs in the ventral horn of the spinal cord
- modulates flexor tone in the upper extremities


Lateral Vestibulospinal Tract

- originates in the medulla
- courses down the spinal cord ipsilateral
- inputs into the ventral horn
- controls extensor tone



- lightening quick responses to stimuli controlled at the level of the spinal cord and spinal nerves


Spina Bifida

- neural tube defect that occurs early in development and can result in damage to the lower portion of the spinal cord
- children born with severe SB can suffer from lower limb paralysis and bowel and bladder issues



- general term for inflammation of the spinal cord
- only affects grey matter: poliomyelitis
- only affects white matter: leukomyelitis
- affects both: transverse myelitis
- inflammation extends to the meninges: meningomyelitis
- caused by: viruses, bacteria, fungi, parasites, toxic agents
- rapid loss of motor and/or sensory abilities in the legs and possibly the loss of reflexes


Peripheral Neuropathy

- inflammation of the peripheral nervous system that results in degeneration of the spinal nerves
- causes: toxic poisoning, infections, metabolic disorders, nutritional issues


Substantia Nigra

- "black substance"
- a layer of dark grey matter between the tegmentum and the crus cerebra
- the place where dopamine is produced



changes sides