purpose: To determine and record the dimensions of various parts of the cerebellum and also to compare the values obtained for dimensions with age and sex of healthy people by MRI.
Materials and Methods: This was an experimental study carried out on 300 healthy individuals referred to imaging center at Imam Reza hospital in the city of Kermanshah, Iran. The precondition for people to enter the study was the approval made by in-house physician based on person’s state of health and the absence of any pathological lesion in brain on the basis of images obtained by MRI. After performing MRI, The dimensions of target parts in cerebellum were calculated by the MRI-associated measuring system and recorded along with the age and sex of the patients. The data analysis was performed using t test, correlation coefficient and regression.
Results: In General, the mean size of the different parts of the cerebellum recorded in mm were as follows: The length of right hemisphere of cerebellum (61.68±2.33], the length of left hemisphere of cerebellum (61.83±1.95], the height of right hemisphere of cerebellum (39.58±2.06], the height of left hemisphere of cerebellum (39.56±1.87], the transverse length of right hemisphere of cerebellum (49.25±1.67], the transverse length of left hemisphere of cerebellum (49.20±1.67], the transverse length of cerebellum (98.48±3.00], the height of vermis (43.13±2.50], the length of superior part of vermis (25.60±1.46], the length of inferior part of vermis (17.59±1.54], the height of posterior part of vermis (21.83±1.74], and finally the length of pyramid of vermis (9.16±1.12].
Conclusion: Based on data found in our study, all parts of the cerebellum except the length of pyramid and the distal height of vermis are bigger in men than in women. Also, more parts of the cerebellum in men were showing of having a significant correlation with age changes compared with women and each part followed a specific pattern in accordance with age changes.