Ascending Tracts (Sensory) Flashcards
What is the highest center for pain in the body?
Thalamus
The thalamus processes pain signals before they reach the sensory cortex.
What type of information does the spinocerebellar tract carry?
Unconscious proprioception
This tract transmits information about body position without conscious awareness.
The dorsal column tract is responsible for which types of sensations?
- Vibration
- Fine touch
- Conscious proprioception
The dorsal column tract consists of two main fasciculi: Gracilis (lower limb) and Cuneatus (upper limb).
Fill in the blank: The _______ tract carries crude touch and pressure sensations.
Anterior Spinothalamic Tract
What are the two components of the spinothalamic tract?
- Lateral Spinothalamic Tract
- Anterior Spinothalamic Tract
The lateral tract transmits pain and temperature sensations, while the anterior tract conveys crude touch and pressure.
True or False: The dorsal column tract conveys unconscious proprioception.
False
The dorsal column tract is responsible for conscious proprioception.
Which nuclei in the thalamus are associated with sensory processing?
- VPL (Ventral Posterolateral Nucleus)
- VPM (Ventral Posteromedial Nucleus)
VPL processes sensory information from the body, while VPM processes sensory information from the face.
What does the term ‘generalized information’ refer to in the context of the nervous system?
Precise unconscious proprioception
This refers to the body’s ability to sense its position and movement without conscious thought.
Fill in the blank: The _______ tract is involved in transmitting pain and temperature sensations.
Lateral Spinothalamic Tract
What is the role of the Nucleus Proprius?
Maintain reflexes
It plays a critical role in the spinal cord’s reflex arcs along with lower motor neuron
What sensory modalities does the cuneate nucleus process?
- Fine touch
- Vibration
- Stereognosis
The cuneate nucleus is part of the dorsal column-medial lemniscus pathway.
What are the two types of spinocerebellar tracts?
- Dorsal Spinocerebellar Tract
- Ventral Spinocerebellar Tract
These tracts carry information about proprioception to the cerebellum.
True or False: The medial lemniscus is involved in the transmission of pain signals.
False
The medial lemniscus primarily transmits fine touch and proprioceptive information.
What does the term ‘substantia gelatinosa’ refer to?
A region involved in pain and temperature sensation processing
It is located in the dorsal horn of the spinal cord.
What is the function of the corona radiata?
Connects thalamus to sensory cortex
It contains axons from thalamic nuclei projecting to the cortex.
Fill in the blank: The _______ tract carries unconscious proprioception from the lower limb.
Dorsal Spinocerebellar Tract
