A hyperextension injury is one caused by excessive hyperextension (knee bending backwards).

hyperextension injury
Momentum carries the person forward, but their foot cannot follow, leading to knee hyperextension.

 

Hyperextension and the PCL

Hyperextension is a classical modus of injury of the posterior cruciate ligament (PCL). There may also be damage to other structures of the posterolateral corner.

Synonyms: 
bending knee backwards
-

Terminology of flexion & extension

A discussion of the words used to describe problems with range of motion of the knee.

Common types of knee injury

An overview of how knee injuries occur.

The knee - range of motion

Part 2 of a course by Dr Frank Noyes on Arthrofibrosis

-

CLINICAL PUBLICATIONS

Hyperextension injuries of the knee: do patterns of bone bruising predict soft tissue injury? Ali AM, Pillai JK, Gulati V, Gibbons CER, Roberton BJ. Skeletal Radiol. 2018 Feb;47(2):173-179. doi: 10.1007/s00256-017-2754-y. Epub 2017 Aug 31.


See also -

and...