Spinal Sensory and Motor Pathways
Quiz yourself by thinking what should be in
each of the black spaces below before clicking
on it to display the answer.
Help!
|
|
||||
|---|---|---|---|---|---|
| show | From somatic receptors to primary somatosensory area in the cerebral cortex
🗑
|
||||
| How many neurons are involved in sensory pathways? | show 🗑
|
||||
| show | Axon collaterals of somatic sensory neurons
🗑
|
||||
| What order neurons conduct impulses to CNS? | show 🗑
|
||||
| show | 2nd order
🗑
|
||||
| show | 3rd order
🗑
|
||||
| What kind of information does the posterior column carry? | show 🗑
|
||||
| show | Medial lemniscus
🗑
|
||||
| What kind of activities use discriminative touch and proprioception? | show 🗑
|
||||
| show | Ability to perceive shape of an object through touch?
🗑
|
||||
| Where are 1st order neurons found in? | show 🗑
|
||||
| Where are 2nd order neurons found in? | show 🗑
|
||||
| show | Ventral posterior nucleus of thalamus
🗑
|
||||
| What kind of information does the posterior column carry? | show 🗑
|
||||
| show | Recognition of exact location object touched skin, two-point discrimination, stereognosis, awareness of position of body parts and direction of movement, ability to sense weight of object, ability to sense vibration
🗑
|
||||
| show | Ability to perceive shape of an object through touch
🗑
|
||||
| What does it mean that the posterior column-medial lemniscus pathway runs ipsilateral? | show 🗑
|
||||
| show | Cell body in dorsal root ganglia
🗑
|
||||
| In the posterior column-medial lemniscus, where do fibers from the lower parts of the body ascend in? | show 🗑
|
||||
| show | Fasciculus cuneatus
🗑
|
||||
| show | Medulla - gracilis (lower) or cuneate (upper) nucleus
🗑
|
||||
| show | Internal arcuate fibers - when axons of neurons cross the midline, forms an arc
🗑
|
||||
| In the posterior column-medial lemniscus, after the 2nd order neuron crosses the midline, where will it be packed? | show 🗑
|
||||
| show | VPL nucleus of thalamus
🗑
|
||||
| In the posterior column-medial lemniscus, at the level of the thalamus, what kind of awareness is exhibited? | show 🗑
|
||||
| In the posterior column-medial lemniscus, what structure do 3rd order neurons have to pass through to reach the cortex? | show 🗑
|
||||
| What kind of information is carried in the anterior spinothalamic tract? | show 🗑
|
||||
| show | Sensory fibers enter spinal cord and synapse with 2nd order in dorsal root where it will cross midline
🗑
|
||||
| In the anterior spinothalamic pathway, what happens before 1st order synapses with 2nd order? | show 🗑
|
||||
| What is the Lissauer's tract? | show 🗑
|
||||
| show | Tip of dorsal horn and surface of spinal cord
🗑
|
||||
| Why would you need Lissauer's tract? | show 🗑
|
||||
| In the anterior spinothalamic pathway, what area does the 2nd order neuron have to cross into? | show 🗑
|
||||
| show | Through anterior white commissure
🗑
|
||||
| show | Small white matter between anterior horns of spinal cord in front of central canal
🗑
|
||||
| What is on both sides of the anterior white commissure? | show 🗑
|
||||
| show | If this is damaged, then both sides are compromised
🗑
|
||||
| show | Travels from anterior column to VPL nucleus of thalamus
🗑
|
||||
| In the anterior spinothalamic pathway, at the level of the thalamus, what is kind of awareness is exhibited? | show 🗑
|
||||
| show | Through internal capsule to cerebral cortex
🗑
|
||||
| show | Full awareness and localization for pressure and touch
🗑
|
||||
| What kind of information is carried through lateral spinothalamic tract? | show 🗑
|
||||
| show | Identical to each other except for function and location
🗑
|
||||
| What is the function of anterior and lateral spinothalamic tract? | show 🗑
|
||||
| In the lateral spinothalamic tract, where does the 1st order neuron synapse with the 2nd order? | show 🗑
|
||||
| In the lateral spinothalamic tract, what neurotransmitter is thought to be released ? | show 🗑
|
||||
| show | Spinotectal tract
🗑
|
||||
| What is the function of the spinotectal tract? | show 🗑
|
||||
| How does the spinotectal tract differ from the spinothalamic? | show 🗑
|
||||
| show | Transmits typical spiniothalamic impulses (like touch) into tectum of brain. Tectum - reflexes
🗑
|
||||
| show | Spinoreticular and spinomesencephailc
🗑
|
||||
| What is the function of the spinoreticular tract? | show 🗑
|
||||
| show | Enters dorsal horn and synapses but does NOT cross. Travels up ipsilateral side in lateral column
🗑
|
||||
| show | Reticular formation
🗑
|
||||
| show | Connects to limbic system – fear and aversion reactions associated with pain
🗑
|
||||
| show | Periaqueductal grey region
🗑
|
||||
| What do the neurons in PAG contain? | show 🗑
|
||||
| show | Cortex or brainstem
🗑
|
||||
| Where do the neurons in the upper motor neurons terminate in? | show 🗑
|
||||
| Where do the corticobulbar tract terminate in? | show 🗑
|
||||
| Where do the corticobulbar tract synapse on? | show 🗑
|
||||
| show | Spinal cord
🗑
|
||||
| Where do the corticospinal tract synapse on? | show 🗑
|
||||
| show | Brainstem; spinal cord
🗑
|
||||
| show | Brain stem or spinal cord
🗑
|
||||
| What does the lower motor neuron innervate? | show 🗑
|
||||
| show | Ventral horn
🗑
|
||||
| Where are the cell bodies of lower motor neurons in the brainstem? | show 🗑
|
||||
| show | Corticospinal tract
🗑
|
||||
| show | Contralateral
🗑
|
||||
| What are some symptoms of an upper motor neuron lesion? | show 🗑
|
||||
| show | Flaccid muscles and atrophy, loss of reflexes, paresis or paralysis when voluntary movement attempted
🗑
|
||||
| What is usually affected in lower motor neuron lesions? | show 🗑
|
||||
| show | Ipsilateral
🗑
|
||||
| show | Internal capsule, crus cerebri of midbrain, basilar portion of pons, pyramids of medulla
🗑
|
||||
| For the corticospinal tracts, what happens at the junction of the medulla and spinal cord? | show 🗑
|
||||
| show | Lateral corticospinal tract
🗑
|
||||
| show | Lateral column of spinal cord
🗑
|
||||
| For the corticospinal tracts, what do the uncrossed fibers form? | show 🗑
|
||||
| show | Anterior column of spinal cord
🗑
|
||||
| For the corticospinal tracts, when does the anterior corticospinal tract cross over? | show 🗑
|
||||
| What is the function of the corticospinal tract? | show 🗑
|
||||
| show | Sensory cortex, cerebellum, etc
🗑
|
||||
| What is the function of the tectospinal tract? | show 🗑
|
||||
| Where does the tectospinal tract begin? | show 🗑
|
||||
| What is the significance of where the tectospinal tract begins? | show 🗑
|
||||
| Do the fibers of the tectospinal tract cross over? | show 🗑
|
||||
| What column does the tectospinal tract travel in? | show 🗑
|
||||
| Where does the tectospinal tract terminate in? | show 🗑
|
||||
| show | Nuclei of cranial nerves III, IV, VI
🗑
|
||||
| What is the significance of CN III, IV, VI? | show 🗑
|
||||
| The spinal accessory nerve is originated from what CN? | show 🗑
|
||||
| show | Lateral vestibular nucleus
🗑
|
||||
| show | Group of nuclei belonging to vestibular part of CN VIII
🗑
|
||||
| show | Fibers don’t cross midline but descend ipsilaterally
🗑
|
||||
| What column does the lateral vestibulospinal tract descend in? | show 🗑
|
||||
| What is the function of the lateral vestibulospinal tract? | show 🗑
|
||||
| show | Inner ear via vestibulocochlear nerve and cerebellum
🗑
|
||||
| show | Pontine – reticular formation of pons; Medullary – reticular formation of medulla
🗑
|
||||
| How do the pontine and medullary reticulospinal tract differ? | show 🗑
|
||||
| What is the function of the reticulospinal tract? | show 🗑
|
||||
| What voluntary movements are influenced by the reticulospinal tract? | show 🗑
|
||||
| What structures does the reticulospinal tract receive input from? | show 🗑
|
||||
| show | Spinomesencephalic tract – stimulation of PAG neurons sends impulses down to dorsal horn of spinal cord and block release of substance P
🗑
|
||||
| What muscles are inhibited in the lateral vestibulospinal tract? | show 🗑
|
||||
| show | Extensor
🗑
|
||||
| What is the implication for inhibition of flexor and excitation of extensor muscles in the vestibulo tract? | show 🗑
|
||||
| What tract is older than corticospinal? | show 🗑
|
||||
| What is the implication of rubrospinal being older than corticospinal? | show 🗑
|
||||
| show | Rubrospinal
🗑
|
||||
| show | Fibers cross over at level of nucleus
🗑
|
||||
| Where does the rubrospinal tract begin? | show 🗑
|
||||
| show | Begins at red nucleus, crosses midline while still in midbrain, goes all the way down to spinal cord (lateral column) and synapses with ventral horn then goes to muscle
🗑
|
||||
| What muscles are inhibited for rubrospinal tract? | show 🗑
|
||||
| What muscles are excited for the rubrospinal tract? | show 🗑
|
||||
| show | Starts at spinal cord then goes all the way up?
🗑
|
||||
| show | Babies already have everything at reflexes except at cortical level. So will have rubrospinal in action then will have cortical once cortical has full myelination
🗑
|
||||
| show | Muscle tone and posture, skeletal muscle control
🗑
|
||||
| Rubrospinal tract receives input from what structures? | show 🗑
|
Review the information in the table. When you are ready to quiz yourself you can hide individual columns or the entire table. Then you can click on the empty cells to reveal the answer. Try to recall what will be displayed before clicking the empty cell.
To hide a column, click on the column name.
To hide the entire table, click on the "Hide All" button.
You may also shuffle the rows of the table by clicking on the "Shuffle" button.
Or sort by any of the columns using the down arrow next to any column heading.
If you know all the data on any row, you can temporarily remove it by tapping the trash can to the right of the row.
To hide a column, click on the column name.
To hide the entire table, click on the "Hide All" button.
You may also shuffle the rows of the table by clicking on the "Shuffle" button.
Or sort by any of the columns using the down arrow next to any column heading.
If you know all the data on any row, you can temporarily remove it by tapping the trash can to the right of the row.
Embed Code - If you would like this activity on your web page, copy the script below and paste it into your web page.
Normal Size Small Size show me how
Normal Size Small Size show me how
Created by:
nnguyen44
Popular Neuroscience sets