Objective
The purpose of this study was to analysis the medial longitudinal arch of the foot with simple radiography Method: We reviewed 387 feet of 219 patients with no deformity who took weight-bearing foot simple radiography. Foot length, length from talonavicular joint to posterior heel (TN), length from cuneonavicular joint to posterior heel (CN), length from cuneiform-metatarsal joint to posterior heel (CM) were measured with the digital imaging and communication in medicine (DICOM) files of the picture archiving communication system (PACS) (PiViewSTAR^Ⱂ, INFINITT, Korea).Results: There was significant correlation of foot length and relative location of joints of medial longitudinal arch. In males, relative value to foot length of TN, CN, CM was 39.86⁑0.97%, 45.97⁑1.20%, and 57.12⁑1.15% respectively. In females, relative value to foot length of TN, CN, CM was 39.41⁑1.19%, 47.12⁑1.44%, and 56.51⁑1.37% respectively. There were significant differences between men and women for location of joints of medial longitudinal arch. Conclusion: Location of joints of the medial longitudinal arch of the foot can be given a numerical value. (J Korean Acad Rehab Med 2005; 29: 119-121)

Objective
To evaluate the influence of weight-bearing on foot shape measured by 3-D foot scanner. Method: Forty-two feet of twenty-one normal subjects were studied. The foot length, width, girth and arch parameters under non weight-bearing and weight-bearing conditions were measured by 3-D foot scanner (Nexcan^Ⱂ, K & I, Korea), analysis software (EnFOOT^Ⱂ, K & I, Korea) and 3-D foot arch measurement program. Results: The foot length, ball width, ball girth, waist girth, instep girth, short heel girth, long heel girth and length from heel point to proximal arch point significantly increased under weight-bearing condition (p＜0.01). However, vamp height, waist height, instep height, length of arch, height of arch, width of arch, length from heel point to distal arch point, maximal arch height and volume of arch were significantly decreased under 50% weight-bearing condition (p＜0.01). Conclusion: Foot parameters associated with length, width and girth increased but volume, width, length, and height of medial longitudinal arch decreased under weight bearing condition. We suggest that these findings under weight- bearing condition result from the pronation of subtalar joint and the decrement of heights of transverse and longitudinal arch heights. (J Korean Acad Rehab Med 2004; 28: 462-468)