The functional anatomy of Kager's fat pad in relation to retrocalcaneal problems

Description: We conclude that the three regions of Kager's fat pad have specialized functions: an FHL part which contributes to moving the bursal wedge during plantarflexion, an Achilles part which protects blood vessels entering this tendon, and a bursal wedge which we suggest minimizes pressure changes in the bursa. All three regions contribute to reducing the risk of tendon kinking and each may be implicated in heel pain syndromes.
The functional anatomy of Kager's fat pad in relation to retrocalcaneal problems and other hindfoot disorders P Theobald, G Bydder, C Dent, L Nokes, N Pugh, and M Benjamin J Anat. 2006 January; 208(1): 91–97. Full text