Bifurcate Ligament Stress Test |
Examination type |
Ligamentous |
Patient & Body Segment Positioning |
The patient
should be long sitting on a treatment table with the distal end
of the gastrocnemius placed on the edge of the table so that the
ankles are hanging off. The ankle should be placed in a neutral
or slightly plantar flexed position. |
Examiner Position |
The examiner
should stand in front of the patient. He/She should use one hand
to stabilize the talus while the other hand is used to grasp the
forefoot. The examiner’s thigh may also be used to stabilize the
calcaneus which will aid in keeping the patient’s foot from
moving. |
Tissues
Being Tested |
Bifurcate
Ligament |
Performing the Test |
To perform
this test, the examiner should use the upper hand to stabilize
the talus as well as to aid in applying varus stress to the
foot while using the other hand to supinate the foot. |
Positive Test |
Pain over
the bifurcate ligament |
Interpretation |
If the test
is positive, the patient has a sprain of the bifurcate ligament |
Common errors in
performing exam |
Common
errors performing this test may include examiners attempting
inversion of the subtalar joint instead of supination which will
stress other ligaments and give a false positive. Also if the
foot is pulled into dorsi flexion instead of neutral to slight
plantar flexion, a false positive may appear because other
ligaments are being stressed here as well. |
Factors possibly
resulting in misinterpretation |
Sprains of
the anterior talofibular ligament and bifurcate ligament sprains
can often be confused with one another because of their close
anatomical proximity and similarity in mechanism or injury. |
Related tests |
|
References |
Bifurcate
Ligament Anatomy:
Magee, David
J. (2002). Orthopedic Physical Assessment. Philadelphia,
PA: Elsevier. |
Links: |
Bifurcate Ligament
Anatomy:
http://www.anatomate.net/web/?p=453
http://www.wheelessonline.com/ortho/frx_of_the_anterior_calcaneal_process
http://bi-info.medicine-for-you.com/404,66472253051234567890104804803411/bifurcate-ligament.htm |
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