{"version":"1.0","provider_name":"Knee Hospitals","provider_url":"https:\/\/www.kneehospitals.com\/blog","author_name":"drknee","author_url":"https:\/\/www.kneehospitals.com\/blog\/author\/drknee\/","title":"J-sign: Definition, Uses, and Clinical Overview - Knee Hospitals","type":"rich","width":600,"height":338,"html":"<blockquote class=\"wp-embedded-content\" data-secret=\"hZeFyNECtn\"><a href=\"https:\/\/www.kneehospitals.com\/blog\/j-sign-definition-uses-and-clinical-overview\/\">J-sign: Definition, Uses, and Clinical Overview<\/a><\/blockquote><iframe sandbox=\"allow-scripts\" security=\"restricted\" src=\"https:\/\/www.kneehospitals.com\/blog\/j-sign-definition-uses-and-clinical-overview\/embed\/#?secret=hZeFyNECtn\" width=\"600\" height=\"338\" title=\"&#8220;J-sign: Definition, Uses, and Clinical Overview&#8221; &#8212; Knee Hospitals\" data-secret=\"hZeFyNECtn\" frameborder=\"0\" marginwidth=\"0\" marginheight=\"0\" scrolling=\"no\" class=\"wp-embedded-content\"><\/iframe><script type=\"text\/javascript\">\n\/* <![CDATA[ *\/\n\/*! This file is auto-generated *\/\n!function(d,l){\"use strict\";l.querySelector&&d.addEventListener&&\"undefined\"!=typeof URL&&(d.wp=d.wp||{},d.wp.receiveEmbedMessage||(d.wp.receiveEmbedMessage=function(e){var t=e.data;if((t||t.secret||t.message||t.value)&&!\/[^a-zA-Z0-9]\/.test(t.secret)){for(var s,r,n,a=l.querySelectorAll('iframe[data-secret=\"'+t.secret+'\"]'),o=l.querySelectorAll('blockquote[data-secret=\"'+t.secret+'\"]'),c=new RegExp(\"^https?:$\",\"i\"),i=0;i<o.length;i++)o[i].style.display=\"none\";for(i=0;i<a.length;i++)s=a[i],e.source===s.contentWindow&&(s.removeAttribute(\"style\"),\"height\"===t.message?(1e3<(r=parseInt(t.value,10))?r=1e3:~~r<200&&(r=200),s.height=r):\"link\"===t.message&&(r=new URL(s.getAttribute(\"src\")),n=new URL(t.value),c.test(n.protocol))&&n.host===r.host&&l.activeElement===s&&(d.top.location.href=t.value))}},d.addEventListener(\"message\",d.wp.receiveEmbedMessage,!1),l.addEventListener(\"DOMContentLoaded\",function(){for(var e,t,s=l.querySelectorAll(\"iframe.wp-embedded-content\"),r=0;r<s.length;r++)(t=(e=s[r]).getAttribute(\"data-secret\"))||(t=Math.random().toString(36).substring(2,12),e.src+=\"#?secret=\"+t,e.setAttribute(\"data-secret\",t)),e.contentWindow.postMessage({message:\"ready\",secret:t},\"*\")},!1)))}(window,document);\n\/\/# sourceURL=https:\/\/www.kneehospitals.com\/blog\/wp-includes\/js\/wp-embed.min.js\n\/* ]]> *\/\n<\/script>\n","description":"The J-sign is a physical exam finding seen when the kneecap (patella) moves in a \u201cJ-shaped\u201d path as the knee straightens. It is most commonly used to evaluate patellar tracking and patellofemoral instability. Clinicians look for it during an office knee exam, often in people with anterior knee pain or a history of the kneecap \u201cslipping.\u201d"}