Studied by 3 peopleVentral Spinothalmic tract function
crude touch posterior dorsal root
Ventral spinothalmic tract synapse
synapses at posterior gray horn
Ventral Spinothalmic crosses over
anterior white column
Ventral spinothalmic 2nd synapse
thalamus
Ventral spinothalmic tract goes to
primary somatosensory cortex (PSSC)
Lateral spinothalmic tract function
pain and temperature dorsal root
Lateral spinothalmic tract synapses at
posterior gray horn after going 1-2 levels
Lateral spinothalmic tract crosses to
lateral white columns on contralteral
Lateral spinothalmic tract 2nd synapse
thalamus
Lateral spinothalmic tract goes to
PSSC
fasciculus cuneatus (DMLP) function
conscious proprioception (T6 UP C1) Vibration Light touch 2-point discrimination
fasciculus cuneatus (DMLP) synapses at
Cuneatus nuclei in the medulla oblongata
fasciculus cuneatus (DMLP) crosses over to
posterior white column and crosses in the medulla oblongata
fasciculus cuneatus (DMLP) 2nd synapse
thalamus
fasciculus cuneatus (DMLP) goes to
PSSC
fasciculus gracilis (DMLP) function
conscious proprioception (T6 down to CO) Light touch vibration 2-point discrimination
fasciculus gracilis (DMLP) synapse
Gracilis nucleus in the medulla oblongata
fasciculus gracilis (DMLP) crosses to
Travels to lateral white columns and crosses at medulla
fasciculus gracilis (DMLP) 2nd synapse
thalamus
fasciculus gracilis (DMLP) goes to
PSSC
Which 4 tracts go to Primary somatosensory cortex?
Ventral Spinothalmic, Lateral Spinothalmic, Facilus cuneatus, facilis gracilis
Cuneocerebellar tract function
Unconscious proprioception hands & neck (C8 - C1)
Cuneocerebellar tract synapse
Accessory cuneate nucleus in the medulla oblongata
Cuneocerebellar tract crosses over
NO but travels to facilis cuneatus in posterior white columns
Cuneocerebellar tract goes to
Inferior peduncle to cerebral cortex doesn't cross in the cerebellum
dorsal spinocerebellar tract function
Unconscious propioception trunk, hand, upper extremity (L2/L3 - C8)
dorsal spinocerebellar tract synapses
Posterior Gray Horn
dorsal spinocerebellar tract crosses over
NO but travels to DSCT in lateral white columns
dorsal spinocerebellar tract goes to
The inferior peduncle on ipalateral (same) side to the cerebral cortex
ventral spinocerebellar tract function
Unconscious Propioception (CO - L2/L3) Feet lower back
ventral spinocerebellar tract synapses
posterior gray horn
ventral spinocerebellar tract crosses over
Crosses to anterior white columns
ventral spinocerebellar tract goes to
Superior peduncle, crosses back to original side and goes to cerebral cortex
Which tracts do not cross?
cuneocerebral tract & Dorsal spinocerebral tract
Which tract goes to superior peduncles?
ventral spinocerebral tract
Lateral cortispinal tract function
voluntary movement to limbs
Lateral cortispinal tract synapse
anterior gray horn after traveling down in lateral white column
Lateral cortispinal tract crosses to
75-90% crosses in medulla oblongata after entering pyramids
Lateral cortispinal tract goes to
Ventral root to limb muscles causes muscle contraction
Anterior cortispinal tract function
voluntary movement for axial muscles
Lateral cortispinal tract synapse
contralateral gray horn after leaving anterior white column
Lateral cortispinal tract crosses to
from anterior white column to contralateral anterior gray column
Lateral cortispinal tract goes to
ventral root to axial muscles causes muscle contractions
What neurons cross over the spinal cord?
interneurons
What nuclei are found in the medulla oblongata?
cuneate nucelus gracilis nucelus accessory cuneate nucelus pyramids
What percentage of the lateral corticospinal tract crosses in the medulla oblongata
75% to 90%
What are peduncles?
connect the cerebellum to the brainstem
If someone has damage on the right side of the spine and injured the lateral spinothalmic tract, where would loss of sensation be?
Left leg
What does the anterior white commissure do?
It transfers information from or to the contralateral side of the brain
Why is gray matter gray and white matter white?
Gray - unmyelinated white - myelinated
What is found in the dorsal root ganglion?
sensory neuron cell bodies
what does the central canal contain? What neuroglia cells would be found there?
Contains CSF. and ependymal cells are there.
Where doe the spinal cord end?
L1 Conus Medullaris
What spinocerebellar tract sense between C8 and L2/L3
Dorsal spinocerebellar tract
Where is the peduncle located
either side of midbrain
What is the cervical enlargement? Where is it?
Does motor in upper extremities (C5 + T1)
What is the lumbar enlargement? Whereis it?
Does motor in lower extremeties (T1- L1)
What is the conus medullaris?
tip of spinal cord
What is caudal equina?
Where the nerves on the spinal cord start to separate and look like a horse's tail
How are the nerves in cervical spine named? How are nerves in thocraiac spine named?
By vertebrae below By vertebrae below
Pairs of spine nerves
31
What does the cervical spine contain? What does the thoracic spine contain? What does the lumbar spine contain? What does the sacrum contain? What does the Coccyx contain?
8 Spinal nerves, 7 vertebrae (C1 - C8) 12 spinal nerves, 12 vertebrae (T1 - T12) 5 Spinal nerves, 5 Vertebrae (L1 - L5) 5 spinal nerves 5 Vertabrae 1 Spinal nerve 1 vertebrae
Note
Flashcard