Seeing pulsation of the artery at the completion of this dissection.

Observing the pulsation of an artery during a dissection can indicate several things. It may suggest that you have dissected along or near a major artery, or that there is increased blood flow in the area. However, it is important to provide more context or information about the specific dissection and location for a more accurate understanding.

To better identify the source of the pulsation, follow these steps:

1. Location of the Pulsation: Determine the exact location of the pulsation. Is it near the region you dissected? Is it within a specific muscle or near a joint? Try to pinpoint the area accurately.

2. Identify the Arterial Pathway: Using anatomical knowledge, identify the major arteries that are present in the region. For example, in the upper limb, you could consider the radial artery, ulnar artery, and brachial artery. In the lower limb, you might consider the femoral artery, popliteal artery, or dorsalis pedis artery.

3. Visual Inspection: Look for any visible pulsating arteries in the vicinity of the dissection. This can help you identify whether the pulsation is actually originating from a dissected artery.

4. Palpation: Gently palpate near the pulsating area to feel the pulsation more clearly. Pay attention to the strength, regularity, and rate of the pulse. Additionally, compare it to the pulse on the opposite side, as it should provide a baseline for comparison.

5. Consult Anatomical Resources: Utilize anatomy textbooks, online resources, or professional anatomy atlases to further enhance your understanding of the arterial supply in the region of dissection. Identify the pathways and branches, as well as any anatomical variations that might influence the source of the pulsation.

Remember, this explanation serves as a general guide, and you should always refer to your own academic resources or consult with a knowledgeable instructor or mentor for a more accurate and comprehensive understanding.