Lambda is the junction of which bones?

Lambda is the junction of which bones?

• A. Occipital bone and parietal bones
• B. Frontal bone and parietal bones
• C. Sphenoid and temporal
• D. Temporal and occipital bones

Answer: (A)

Lambda marks the junction between the sagittal and lambdoid sutures, where the occipital bone meets the parietal bones at the back of the skull. This posterior cranial landmark aligns with the posterior fontanelle in infants and serves as a key reference point in cranial evaluation. That’s why the bones involved are the occipital and parietal bones. The anterior counterpart, where the sagittal and coronal sutures meet, involves the frontal and parietal bones (the bregma). The pterion is a multi-bone junction involving the frontal, parietal, sphenoid, and temporal bones, and the squamous suture lies between the temporal and parietal bones but is not the lambda.

Lambda marks the junction between the sagittal and lambdoid sutures, where the occipital bone meets the parietal bones at the back of the skull. This posterior cranial landmark aligns with the posterior fontanelle in infants and serves as a key reference point in cranial evaluation.

That’s why the bones involved are the occipital and parietal bones. The anterior counterpart, where the sagittal and coronal sutures meet, involves the frontal and parietal bones (the bregma). The pterion is a multi-bone junction involving the frontal, parietal, sphenoid, and temporal bones, and the squamous suture lies between the temporal and parietal bones but is not the lambda.