Podcast
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?
Which of the following tracts is found in the lateral funiculus?
Which of the following tracts is found in the lateral funiculus?
Where is the anterior funiculus located in the spinal cord?
Where is the anterior funiculus located in the spinal cord?
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?
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What characteristic axons are mainly found in the posterior funiculus?
What characteristic axons are mainly found in the posterior funiculus?
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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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Description
Test your knowledge on the posterior and lateral funiculus of the spinal cord. This quiz covers the functions and structures related to sensory and motor pathways, including details about the fasciculus gracilis, fasciculus cuneatus, and various ascending and descending tracts. Enhance your understanding of spinal cord anatomy and physiology.
