background: noise can cause permanent or temporary hearing loss. high levels of noise may stimulate the vestibular system and thereby cause disturbances in the balancing mechanism. objective: to determine the effect of long-term exposure to occupational noise on the vestibular system. methods: a dizziness questionnaire was administered to 20 factory workers who were exposed to occupational nois...

alopecia areata is a dermatologic disorder which presents itself with sudden and patchy hair loss. the aim of this study is to assess the issues related to the similar condition in ancient manuscripts of traditional persian medicine. this is a descriptive review study in which a number of well-known traditional persian manuscripts such as; kamil al-sina’a al-tibbiyyaby al-majusi, ‘ali ibn al-’a...

we compared the extent of temporary threshold shift (tts) and hair cell loss following high level 4 khz noise exposure with those preconditioned with moderate level 1 and 4 khz octave band noise. fifteen male albino guinea pigs (300- 350 g in weight) were randomly allocated into three groups: those exposed to 4 khz octave band noise at 102 db spl (group 1, n=5); those conditioned with 1 khz oct...