Ascending Somatosensory Tracts
- Previous year questions on Ascending Somatosensory Tracts for NEET PG (National Eligibility cum Entrance Test - Postgraduate), from the Physiology section of the exam.
- Most questions here come from previous-year papers of Indian postgraduate medical entrance and licensing exams; where a paper and year are recorded the question carries them. The image-based questions are original vignettes written around an openly licensed figure, and were never asked in any exam.
- 49 live questions in Ascending Somatosensory Tracts.
- Physiology is worth about 17 of 300 questions on the exam. See every subject’s weightage.
- Question set last updated 6 Sept 2026.
Q1.Lesion in the medial lemniscus at the level of pons causes which of the following?
- APain and temperature loss in the same side
- BPain and temperature loss in the opposite side
- CLoss of tactile and proprioception on the same side
- DLoss of tactile and proprioception on the opposite side✓ Correct answer
Q2.Nociceptive signals are transmitted primarily to which of the following?
- ANucleus caudalis✓ Correct answer
- BLimbic system
- CReticular system
- DSuperior cervical ganglion
Q3.The pathway of pain from teeth and temperature is carried by:
- ACorticospinal tract
- BCorticocerebral tract
- CLateral spinothalamic tract✓ Correct answer
- DVentral spinothalamic tract
Q4.All of the following are carried by the dorsal column except?
- APain✓ Correct answer
- BProprioception
- CVibration
- DTouch
Q5.Cardiac pain may be transmitted to the jaw due to the overlapping of:
- A5th cranial nerve, third cervical nerve and first thoracic nerve✓ Correct answer
- B7th cranial nerve, third cervical nerve and first thoracic nerve
- C5th cranial nerve, second cervical nerve and first thoracic nerve
- D7th cranial nerve, second cervical nerve and first thoracic nerve
Q6.Pain and temperature sensation is carried by:
- AVentral spinothalamic tract
- BLateral spinothalamic tract✓ Correct answer
- CCorticospinal tract
- DDorsal column
Q7.All are carried through anterolateral system except:
- AProprioception✓ Correct answer
- BTemperature
- CPain
- DCrude touch
Q8.Fine touch is lost in lesion of
- AAnterior spinothalamic tract
- BLateral spinothalamic tract
- CDorsal column pathway✓ Correct answer
- DPyramidal tract
Q9.If a single spinal nerve is cut, the area of tactile loss is always greater than the area of loss of painful sensations, because
- ATactile information is carried by myelinated fast conducting fibres
- BTactile receptors adapt quickly
- CDegree of overlap of fibres carrying tactile sensation is much less✓ Correct answer
- DIn the primary sensory cortex, tactile sensation is represented on a larger area
Q10.Ventrolateral cordotomy for relief of pain in right lower limb is by cutting the:
- ALeft ventral spinothalamic tract
- BLeft lateral spinothalamic tract✓ Correct answer
- CRight ventral spinothalamic tract
- DRight lateral spinothalamic tract
Answer key
Q1: D. Loss of tactile and proprioception on the opposite side; Q2: A. Nucleus caudalis; Q3: C. Lateral spinothalamic tract; Q4: A. Pain; Q5: A. 5th cranial nerve, third cervical nerve and first thoracic nerve; Q6: B. Lateral spinothalamic tract; Q7: A. Proprioception; Q8: C. Dorsal column pathway; Q9: C. Degree of overlap of fibres carrying tactile sensation is much less; Q10: B. Left lateral spinothalamic tract.
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