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Morton's toe (or Morton's foot, Greek foot, "Royal toe", "Turkey toe", "LaMay toe", "Sheppard's toe", Morton's syndrome, long toe, boss toe) is the condition of a shortened first metatarsal in relation to the second metatarsal. It is a type of brachymetatarsia.〔 The metatarsal bones behind the toes vary in relative length. For most feet, a smooth curve can be traced through the joints at the bases of the toes. But in Morton's foot, the line has to bend more sharply to go through the base of the big toe, as shown in the diagram. This is because the first metatarsal, behind the big toe, is short compared to the second metatarsal, next to it. The longer second metatarsal puts the joint at the base of the second toe (the second metatarsal-phalangeal, or MTP, joint) farther forward. If the big toe and the second toe are the same length (as measured from the MPT joint to the tip, including only the phalanges), then the second toe will protrude farther than the big toe, as shown in the photo. If the second toe is shorter than the big toe, the big toe may still protrude the farthest, or there may be little difference, as shown in the X-ray. ==History== The name derives from American orthopedic surgeon Dudley Joy Morton (1884–1960),〔(Morton's syndrome (Dudley Joy Morton) ) at ''Who Named It?''〕 who originally described it as part of Morton's triad (a.k.a. Morton's syndrome or Morton's foot syndrome):〔 a congenital short first metatarsal bone, a hypermobile first metatarsal segment, and calluses under the second and third metatarsals. Confusion has arisen from the term also sometimes being used for a different condition, Morton's neuroma, a term coined by Thomas George Morton (1835–1903) for a syndrome involving pain caused by neuroma between the third and fourth toes.〔(Thomas George Morton at ''Who Named It?'' )〕 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Morton's toe」の詳細全文を読む スポンサード リンク
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