IV.A.3 Head & Back: Dura Page 1 of 5
Objectives:1.3.1 Identify and compare the meninges in the cranial cavity and spinal canal and the dural folds that divide the cranium. 1.3.2 Trace the flow of blood into the cranial cavity. Follow the flow of blood through the cerebral arterial circle. 1.3.3 Indicate the region of cerebrum and cerebellum supplied by each major branch and known vascular interconnections. 1.3.4 Identify the meninges in the cranial cavity and the dural folds that divide the cranium. 1.3.5 Trace the flow of blood out of the cranial cavity. 1.3.6 Identify the interconnections of the dural venous sinuses and known connections between them and the venous system of the head and neck. |
Assigned Readings:Moore's COA: Pages 873-880, 891-893. See the blue boxes on pages 893-896 for clinical correlations. See the yellow box on page 896 for "The Bottom Line." |
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| Step 1: Begin with the aortic arch. | |
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| 🔍 Tap on image to enlarge |
| Step 2: Add the brachiocephalic trunk. | |
| Step 3: Add the right subclavian artery. | |
| Step 4: Add the left subclavian artery. | |
| Step 5: Add the right vertebral artery. | |
| Step 6: Add the left vertebral artery. |
| Step 7: Add the vertebra CVII,T1 and TII. | |
| Step 8: Add the vertebra CIII,CIV,CV and CVI. |
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One of the distinguishing features of the cervical vertebra is the presence of the foramen transversarium. Why does the vertebral artery not pass through the foramen transversarium of CVII? |
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Rotate the cadaver and notice that to pas through the CVII foramen transversarium would require an acute angular change in the direction of the artery, thereby allowing for kinks in the vertebral artery and possible obstuction of blood flow to the brain. You can easily see this by rotaing the cadaver 90 degrees. |
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