CNS TRACTS OVERVIEW (Descending)

What funiculus is the anterior corticospinal tract found in?

Anterior

What cord level is the anterior corticospinal tract found in?

T6 and up

Where do you find the cell bodies of the anterior cortiospinal tract?

precentral gyrus of the cortex

Where does the anterior corticospinal tract synapse?

anterior horn: rexed lamina 7

How does the anterior corticospinal tract cross over?

crosses over in the cord at the level it affects

What type of information does the anterior corticospinal tract carry?

the function is unclear, but they influence axial muscles of the neck and shoulders

Are the corticospinal tracts pyramidal?

Yes, it means that they are voluntary

What funiculus is the lateral corticospinal tract found in?

lateral

At what cord level do you find the lateral corticospinal tract?

all

Where do you find the cell bodies of the lateral corticospinal tract?

precentral gyrus of cortex

Where does the lateral corticospinal tract synapse?

anterior horn: rexed lamina 7

How does the lateral corticospinal tract cross?

crosses in the pyramids of the medullar oblongata

What type of information does the lateral corticospinal tract carry?

skilled voluntary movement of the distal extremities (hands and feet) carry most of the corticospinal information (85-95%)

What funiculus is the tectospinal tract in?

anterior

At what cord level do you find the tectospinal tract?

C4/C5 and up

Where do you find the cell bodies for the tectospinal tract?

midbrains tectum (superior colliculus)

Where does the tectospinal tract synapse?

anterior horn: rexed laminated 7--> 9 (LMN's)

How doe the tectospinal tract cross over?

gradually as it descends

What type of information does the tectospinal tract carry?

postural reflexes dealing with visual and auditory acuity, traps, SCM (FLINCHING)

What funiculus do you find the rubrospinal tract?

lateral

At what cord levels do you find the rubrospinal tract?

all

Where do you find the cell bodies for the rubrospinal tract?

tegmenjtum of the midbrain (nucleus tuber/ red nucleus)

Where does the ruberospinal tract synapse?

anterior horn: rexed lamina 7 --> 9 (LMN's)

How does the rubrospinal tract cross over?

gradually as it decends

What type of information does the rubrospinal tract carry?

contralateral hand/foot flexors and inhibits the extensors

What funiculus do you find the vestibulospinal tract?

anterior/lateral

At what cord level do you find the vestibulospinal tract?

all

Where do you find the cell body for the vestibulospinal tract?

medulla oblongata (lateral vestibular nucleus/ dieters nucleus)

Where does the vestibulospinal tract synapse?

anterior horn: rexed laminated 7-9 (LMN's)

How does the vestibulospinal tract cross over?

does not cross

What type of information does the vestibulospinal tract carry?

ipsilateral extensors while inhibiting flexors

Is the vestibulospinal tract pyramidal?

no that means that it is INVOLUNTARY

Is the tectospinal tract pyramidal?

no, extrapyramidal meaning that it is INVOLUNTARY

Is the rubrospinal tract pyramidal?

no, extrapyramidal meaning that it is INVOLUNTARY

What funiculus do you find the medial reticulospinal tract?

anterior

At what cord level do you find the medial reticulospinal tract?

all

Where do you find the cell bodies of the medial reticulospinal tract?

pons tegmentum

Where does the medial reticulospinal tract synapse?

anterior horn: rexed lamina 7

How doe the medial reticulospinal tract cross?

does not cross

What type of information does the medial reticulospinal tract carry?

Autonomic Nervous System (HR BP and Respiration) alternative to the pyramidal tracts

What funiculus is the lateral retriculospinal tract?

lateral

At what cord level do you find the lateral reticulospinal tract?

all

Where do you find the cell bodies of the lateral reticulospinal tract?

medulla oblongata

Where does the lateral reticulospinal tract synapse?

anterior horn: rexed lamina 7

How does the lateral reticulospinal tract cross?

does not cross

What type of information does the lateral reticulospinal tract carry?

Autonomic nervous system (HR BP and Respiration) alternative to pyramidal tracts

At what cord level do you find the propriospinal tract?

all

Where do you find the cell bodies of the propriospinal tract?

gray matter of cord

Where does the propriospinal tract synapse?

grey matter of the cord

How does the propriospinal tract cross?

does not cross

What type of information does the propriospinal tract carry?

spinal reflexes (first to be myelinated)

At what cord level do you find the dorsolateral tract of lissauer?

all

Where do you find the cell bodies of the dorsolateral tract of lissauer?

between rexed lamina 1 and posterior sulcus of cord

Where does the dorsolateral tract of lissauer synapse?

posterior horn: rexed lamina 2

How does the dorsolateral tract os lissauer cross?

does not cross

What type of information does the dorsolateral tract of lissauer carry?

contains many contralateral branches