Functio laesa

loss of function
Functio laesa is a term used in medicine to refer to a loss of function or a disturbance of function.wikipedia
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Inflammation

inflammatoryinflammatory responseinflamed
It was identified as the fifth sign of acute inflammation by Galen, who added it to the four signs identified by Celsus (tumor, rubor, calor, and dolor).
The five classical signs of inflammation are heat, pain, redness, swelling, and loss of function (Latin calor, dolor, rubor, tumor, and functio laesa).

Galen

Galen of PergamonGalenic medicineGalenus
It was identified as the fifth sign of acute inflammation by Galen, who added it to the four signs identified by Celsus (tumor, rubor, calor, and dolor).

Aulus Cornelius Celsus

CelsusCornelius CelsusA.Cornelius Celsus
It was identified as the fifth sign of acute inflammation by Galen, who added it to the four signs identified by Celsus (tumor, rubor, calor, and dolor).

Thomas Sydenham

SydenhamLord Thomas SydenhamSydenham, Thomas
The attribution to Galen is disputed, and has variously been attributed to Thomas Sydenham and Rudolf Virchow.

Rudolf Virchow

VirchowRudolph VirchowRudolf Ludwig Karl Virchow
The attribution to Galen is disputed, and has variously been attributed to Thomas Sydenham and Rudolf Virchow.

Phlegmon

As with any form of inflammation, phlegmon presents with inflammatory signs dolor (localized pain), calor (increase local tissue temperature), rubor (skin redness/hyperemia), tumor (either clear or non-clear bordered tissue swelling), functio laesa (diminish affected function).