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Questions and Answers
What type of sensory information is transmitted by the fasciculus gracilis?
What type of sensory information is transmitted by the fasciculus gracilis?
- Crude touch and temperature sensations
- Sensory information from the lower body (correct)
- Pressure and vibration sensations from the face
- Sensory information from the upper body
Which of the following tracts is found in the lateral funiculus?
Which of the following tracts is found in the lateral funiculus?
- Fasciculus cuneatus
- Spinothalamic tract (correct)
- Corticospinal tract
- Anterior spinothalamic tract
Where is the anterior funiculus located in the spinal cord?
Where is the anterior funiculus located in the spinal cord?
- In the dorsal portion
- Just anterior to the posterior funiculus
- In the lateral sides
- In the anterior (ventral) portion (correct)
Which of the following is a major descending tract found in the anterior funiculus?
Which of the following is a major descending tract found in the anterior funiculus?
What characteristic axons are mainly found in the posterior funiculus?
What characteristic axons are mainly found in the posterior funiculus?
Flashcards
Posterior Funiculus
Posterior Funiculus
Part of the spinal cord carrying sensory information from the body to the brain, including position, movement, vibration, and touch.
Fasciculus Gracilis
Fasciculus Gracilis
Sensory tract in the posterior funiculus, carrying info from the lower body.
Lateral Funiculus
Lateral Funiculus
Spinal cord region with both ascending (sensory) and descending (motor) tracts; controls movement, balance, and sensory input around the body.
Anterior Funiculus
Anterior Funiculus
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Spinothalamic Tract
Spinothalamic Tract
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Study Notes
Posterior Funiculus
- Contains the fasciculus gracilis and fasciculus cuneatus.
- Fasciculus gracilis transmits sensory information from the lower body.
- Fasciculus cuneatus transmits sensory information from the upper body.
- These tracts carry proprioceptive information (position and movement sense), vibration sense, and two-point discrimination from the limbs and trunk to the brain.
- Located on the dorsal (back) portion of the spinal cord.
- Axons are large and myelinated.
Lateral Funiculus
- Contains several ascending and descending tracts.
- Ascending tracts include the spinothalamic tract (pain, temperature, crude touch), spinocerebellar tracts (proprioception to cerebellum) and posterior spinocerebellar tract.
- Descending tracts include corticospinal tract, rubrospinal tract, and vestibulospinal tract, which control voluntary movement, muscle tone and balance.
- Located on the lateral sides of the spinal cord.
- Contains both myelinated and unmyelinated axons.
Anterior Funiculus
- Located in the anterior (ventral) portion of the spinal cord
- Contains primarily descending tracts.
- Major descending tracts include the corticospinal tract (voluntary movements), reticulospinal tract (muscle tone), and tectospinal tract (reflexes to visual and auditory stimuli), and vestibulospinal tract.
- Contains both myelinated and unmyelinated axons.
- Also contains some ascending fibers
- Example of ascending fibers is the anterior spinothalamic tract, carrying information about light touch and pressure from the body to the brain.
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