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peroneus longus<\/strong> wraps under the lateral foot to insert medially onto the 1st cuniform and proximal end of 1st metatarsal. approximately 20% of patients have an os peroneum (accessory ossicle) at the insertion<\/p>peroneus brevis<\/strong> inserts to the base of the 5th metatarsal.<\/p>anatomy of the peroneal tendons. ref: anatomylearning.com<\/figcaption><\/figure>\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\n\t\t\t\t\t\t\t\t\t\t
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\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\n\t\t\t\t\t\t\t\tpatient position\t\t\t\t\t\t\t<\/span>\n\t\t\t\t\t\t<\/span>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t
\n\t\t\t\t\t\t\t\t\t\t<\/i>\t\t\t\t\t\t\t\t\t<\/span>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\n\t\t\t\t\t\t\t\t\t\t<\/i>\t\t\t\t\t\t\t\t\t<\/span>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\n\t\t\t\t\t\n\t\t\t\t\t\t
to scan the peroneus tendons:<\/span><\/p>you need access to the lateral ankle and foot in a position to invert\/evert the foot.<\/span><\/li>patient supine or with their foot off the side of the bed is best.<\/span><\/li><\/ul>\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\n\t\t\t\t\t\t\t\t\t\t
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\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\n\t\t\t\t\t\t\t\ttechnique\t\t\t\t\t\t\t<\/span>\n\t\t\t\t\t\t<\/span>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t
\n\t\t\t\t\t\t\t\t\t\t<\/i>\t\t\t\t\t\t\t\t\t<\/span>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\n\t\t\t\t\t\t\t\t\t\t<\/i>\t\t\t\t\t\t\t\t\t<\/span>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\n\t\t\t\t\t\n\t\t\t\t\t\t
to identify the peroneus tendons:<\/span><\/p>place the probe transversely, posterior to the lateral malleolus (proximal to the malleolar tip)<\/span><\/li>ensure the fibula is visible on the image.<\/span><\/li>the pb and pl will be in the centre of your image. pb will be deepest and against the bone with pl ontop of it.<\/span><\/li>slide proximally to the musculo-tendinous junction.<\/span><\/li>now slide distally following the tendons until they separate.<\/span><\/li><\/ol>\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\n\t\t\t\t\t\t\t\t\t\t
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\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\n\t\t\t\t\t\t\t\tnormal appearances\t\t\t\t\t\t\t<\/span>\n\t\t\t\t\t\t<\/span>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t
\n\t\t\t\t\t\t\t\t\t\t<\/i>\t\t\t\t\t\t\t\t\t<\/span>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\n\t\t\t\t\t\t\t\t\t\t<\/i>\t\t\t\t\t\t\t\t\t<\/span>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\n\t\t\t\t\t\n\t\t\t\t\t\t
normal appearance:<\/span><\/p>proximal to the malleolus:<\/span><\/li><\/ul>transverse: peroneus longus tendon is formed. peroneus brevis musculo-tendinous junction is still visible\u00a0<\/span><\/p>at the level of the malleolus:<\/span><\/li><\/ul>transverse: both tendons echogenic and homogeneous. peroneus brevis against the fibula. peroneus longus on top.<\/span><\/p>longitudinal: echogenic and fibrillar tendons.<\/span><\/p>distal to the malleouls:<\/span><\/li><\/ul>the tendons move apart. the tendon sheaths terminate approximately 3cm from the malleolus.<\/span><\/p>tips:<\/span><\/p>brevis-bone-base.<\/em> peroneus b<\/strong>revis is closer to the b<\/strong>one and then inserts onto the b<\/strong>ase of the 5th metatarsal.<\/span><\/p>\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\n\t\t\t\t\t\t\t\t\t\t
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\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\n\t\t\t\t\t\t\t\twhat to look for?\t\t\t\t\t\t\t<\/span>\n\t\t\t\t\t\t<\/span>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t
\n\t\t\t\t\t\t\t\t\t\t<\/i>\t\t\t\t\t\t\t\t\t<\/span>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\n\t\t\t\t\t\t\t\t\t\t<\/i>\t\t\t\t\t\t\t\t\t<\/span>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\n\t\t\t\t\t\n\t\t\t\t\t\t
once you identify the 2 tendons:<\/span><\/p>are they fibrillar and homogeneous<\/span><\/li>is there any fluid in the sheath (there should not be any visible fluid)<\/span><\/li>do the tendons glide freely when mobilized (invert\/evert the forefoot)<\/span><\/li>does the brevis underlie longus at the malleolus<\/span><\/li>are they both intact at their insertions<\/span><\/li><\/ol>tip: peroneus brevis may split at the malleolus with peroneus longus laying partially or entirely within the division.<\/span><\/p>\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t