Question 1362
{"accessible":false,"alternatives":[{"id":6790,"text":"rostrum"},{"id":6791,"text":"genu"},{"id":6792,"text":"anterior body"},{"id":6793,"text":"posterior body"},{"id":6794,"text":"splenium"}],"archived":false,"correctAlternativeId":6790,"explanation":"\u003cp\u003eTraditionally, it was believed that development begins in the genu and progresses posteriorly. More recent studies, including using MR tractography, cast some doubt on this assertion, instead suggesting that the anterior body develops first and then continues bidirectionally, with the anterior portions (genu) developing earlier/more prominently than the posterior portions (splenium). In either case,\u0026nbsp;the rostrum appears last.\u003c/p\u003e\u003cp\u003eThus, an intact rostrum is a good sign that callosogenesis completed normally, which in turn is helpful as in many structural congenital anomalies the corpus callosum is involved.\u0026nbsp;\u003c/p\u003e","id":1362,"imageUrl":null,"imageAttribution":null,"imageAttributionCaseInfo":null,"firstQuestionPath":"/questions/2167","nextQuestionPath":"/articles/dysgenesis-of-the-corpus-callosum/questions/342","relatedArticles":[{"id":4672,"title":"Corpus callosum","link":"/articles/corpus-callosum?lang=us"},{"id":28361,"title":"Neurodegenerative MRI brain (an approach)","link":"/articles/neurodegenerative-mri-brain-an-approach?lang=us"}],"alsoUsedIn":[{"id":492,"kind":"Course","title":"Neurodegenerative Learning Pathway - page 492","link":"https://radiopaedia.org/courses/neurodegenerative-learning-pathway/pages/492"},{"id":1052,"kind":"Course","title":"Neurodegenerative Learning Pathway - page 1052","link":"https://radiopaedia.org/courses/neurodegenerative-learning-pathway/pages/1052"},{"id":1052,"kind":"Course","title":"[TRIAL] Neurodegenerative Learning Pathway - page 1052","link":"https://radiopaedia.org/courses/trial-neurodegenerative-learning-pathway/pages/1052"},{"id":1173,"kind":"Course","title":"Adult Neuroradiology Review Course - page 1173","link":"https://radiopaedia.org/courses/adult-neuroradiology-review-course/pages/1173"},{"id":1173,"kind":"Course","title":"Adult Neuroradiology Review Course - page 1173","link":"https://radiopaedia.org/courses/adult-brain-mri-review-course-2015-online-video/pages/1173"}],"stem":"\u003cp\u003eWhich part of the corpus callosum forms last?\u003c/p\u003e","menuLinks":[{"text":"Report problem with question","url":"https://docs.google.com/forms/d/e/1FAIpQLSfO3soWYhOjJ7yErSysyCe5V4A1CqW7WK3rDA7MtAkecMGqNw/viewform?entry.1624461248\u0026entry.553583435=https://radiopaedia.org/questions/1362"}],"attemptsPercentages":[{"alternativeId":"6791","percentage":4},{"alternativeId":"6794","percentage":23},{"alternativeId":"6790","percentage":67},{"alternativeId":"6793","percentage":4},{"alternativeId":"6792","percentage":1}],"promptToLogin":false,"questionManager":false,"articleId":"dysgenesis-of-the-corpus-callosum"}