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Medicine

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Neurology

Question
2 out of 12
 

Which is not affected in lesion of posterior column of spinal cord? (LQ)



A Romberg's sign
B Temperature sense

C Vibration sense
D Ataxia

Ans. B

Temperature sense

Sensations Transmitted by Posterior / Dorsal Column

1). Fine Touch (Sensations requiring fine gradients of intensity / high degree of localization

2). Fine Pressure (Fine degrees of judgment of pressure intensity)

3). Vibration

4). Joint Position Sense

Sensations Transmitted by Anterolateral Column / Spinothalamic Tract

1). Crude Touch

2). Crude pressure

3). Pain (Pin Prick)

4). Temperature

Extra Point : Fine touch are transmitted by the Posterior column.

Segmental levels of some common reflexes include:

Deep

Superficial

Ankle jerk : S1, S2

Knee jerk : L3,4

Biceps jerk: C5, 6

Triceps jerk : C 7,8

Radial jerk : C 6

Jaw Jerk : Pons

Plantar reflex : S1, S2

Abdominal reflex : T7 - T11 Cremasteric reflex : L1


Beevor’s sign

1). It is characteristic of spinal cord injury between T6 and T10 levels.

2). This occurs because the upper abdominal muscle such as the Rectus Abdominus are intact at the top of the abdomen but weak at the lower portion. Thus when the patient is asked to do a sit up only the upper muscles contract pulling the umbilicus toward the head in patients who are abnormal.

3). It is also seen in amyotrophic lateral sclerosis and facioscapulohumeral muscular dystrophy.

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