RESUMEN
Background: Musicians' performance-related musculo-among skeletal problems ranges from mild pain during performance to severe pain, which may lead the instrumentalist to quit playing. The aim of this study was to investigate musculoskeletal problems and its prevalence
Methods: This research was performed on Daf and Setaar students in three teaching centers and 90 persons [12 in the control group and 78 in the case group] were included. After taking a thorough medical history, the volunteers underwent a standard upper extremity physical examination with special attention to the musculoskeletal and nervous systems. Presence of pain, tenderness, joint range of motion, sensory or motor problems were sought and all of the cases underwent a nerve conduction velocity study
Results: Out of 78 students, 42 played the Daf [15 males, 25 females] and 36 played the Setaar [16 males, 20 females]. In the whole group, the prevalence of musculoskeletal pain was 53%, but no one had carpal tunnel syndrome. The prevalence of musculoskeletal problems among Daf students was greater in comparison with Setaar students [57% versus 47%, respectively] although this difference was not statistically significant
Conclusion: This study reveals that the prevalence of musculoskeletal pain among non-professional Daf or Setaar players is equal to professional classical music performers in the West. Why this is so, remains to be studied
RESUMEN
Background: Visual evoked potential [VEP] is a valuable diagnostic test in symptomatic and subclinical cases of multiple sclerosis. The aim of this study was to evaluate the rate and abnormal patterns of VEP in patients with definite diagnosis of multiple sclerosis
Materials and Methods: Two-hundred definite cases of multiple sclerosis including 144 women and 56 men [15-52 years old] were enrolled in the study and underwent VEP examination. Latencies and amplitudes of potentials were registered. The control group consisted of 25 healthy men and 25 healthy women with an age range of 16 to 48 years
Results: Among the 200 definite clinically proven cases of multiple sclerosis, 147 cases [73.5%] had an abnormal VEP and 121 cases [60.5%] had visual problems. Seventy-nine cases [39.5%] had no visual problems. In the first group, 119 cases [98.3%] and in the second group, 28 cases [35.4%] had an abnormal VEP, respectively
Conclusion: In this study, the most valuable diagnostic findings were prolonged P1 latency and its interocular difference. Amplitude changes alone had less diagnostic yield