A vascular lesion in the mid-brainstem level in the area depicted in the figure can cause all of the following except:
A. Deviation of the tongue to the same side
B. Contralateral loss of pain and temperature below the neck
D. Paralysis of soft palate
Answer- A. Deviation of the tongue to the same side
A vascular lesion at the level of lateral part of medulla leads to the lateral medullary syndrome (Wallenberg syndrome).
Characteristic features of Wallenberg syndrome (Laterat medullary syndrome):
- Spinothalamic tract involvement: Impaired pain and thermal sense over half the body, sometimes face
- Vestibular nucleus involvement: Nystagmus, diplopia, oscillopsia, vertigo, nausea, vomiting
- Issuing fibers ninth and tenth nerves: Dysphagia, hoarseness paralysis of palate, paralysis of vocal cord, diminished gag reflex.