Injury to cervical sympathetic trunk produces Horner's syndrome, that includes all, except: (A) Anhydrosis, (B) Enopthalmos, (C) Ptosis, (D) Mydriasis
Answer is D. Injury to cervical Symphathetic trunk (which are formed by T1 to T4 fibres of spinal cord) produces Horner's syndrome. It is characterized by
• ptosis (dropping of the upper eyelid)
• miosis (constriction of pupil)
• anhydrosis (loss of sweating)
• enophthalmos (retraction of eye ball)