Lambda is meeting point of:
**Core Concept**
The lambda is an anatomical landmark located at the junction of two important sutures in the skull. It is a crucial reference point for surgeons and radiologists to identify the location of various intracranial structures. The lambda suture is part of the posterior cranial fossa and plays a significant role in the attachment of the occipital bone.
**Why the Correct Answer is Right**
The lambda is the meeting point of the sagittal and lambdoid sutures. The sagittal suture is a fibrous joint that connects the two parietal bones, while the lambdoid suture is a fibrous joint that connects the parietal bone with the occipital bone. At the lambda, these two sutures intersect, forming a characteristic "V" shape. The lambda is an important landmark for identifying the posterior cranial fossa and the location of the cerebellum.
**Why Each Wrong Option is Incorrect**
**Option A:** The coronal and sagittal sutures meet at the bregma, not the lambda. The bregma is an anterior landmark that is located where the coronal and sagittal sutures intersect.
**Option B:** The lambda is not the meeting point of the coronal and lambdoid sutures. The lambdoid suture meets the parietal bone at the lambda, but it does not intersect with the coronal suture.
**Option D:** This option is incorrect because the lambda is indeed a real anatomical landmark, and it is the meeting point of the sagittal and lambdoid sutures.
**Clinical Pearl / High-Yield Fact**
The lambda is an essential landmark for surgeons performing posterior fossa surgeries, such as those involving the cerebellum or the brainstem. Familiarity with the lambda and its relationship to the sagittal and lambdoid sutures is crucial for accurate localization of intracranial structures during surgery.
**β Correct Answer: C. Sagittal and lambdoid suture**