Spinal Tracts

Ventral 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