The Spine Flashcards
what are the three functions of the spinal cord?
sensory in from body to brain, motor from brain to body and controls reflexes
what is the spinal cord protected by?
meninges
what are meninges?
membranes that cover the spinal cord and brain
what are the layers of meninges?
Dura mater (leather like), subdural space filled with interstitial fluid, Arachnoid mater, subarachnoid space filled with CSF, pia mater (thin layer lining)
spinal cord in new born is from?
magnum foramen to L4
spinal cord in adult is from?
magnum foramen to L1
spinal nerve is composed of what two roots?
dorsal - sensory and ventral - motor
dorsal root gangion are composed of?
cell bodies of sensory neurons
what are the sensory tracts in the spinal cord?
- dorsal columns 2. spinothalamic tracts 3. spinocerebellar tracts
what is the dorsal column responsible for?
proprioception, vibration, pressure, two point discriminative, discriminative touch
what is the spinothalamic responsible for?
temperature, pain, deep pressure, crude touch
what is the spinocerebellar responsible for?
unconscious proprioception
what are the motor tracts in the spinal cord?
direct (pyramidal) pathway and indirect (extrapyramidal) pathway
what is direct (pyramidal) tract responsible for?
precise, voluntary movement
what is indirect (extrapyramidal) pathways responsible for?
programmed/automatic movement