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Anatomy / Physiology Cerebrovascular System
Question | Answer |
---|---|
The arterial pulsations felt in front of the ear and just above the zygomatic arch are from which artery? | Superficial Temporal Artery |
The common carotid artery divides into its external and internal branches usually at the level of the upper border of the? | Thyroid Cartilage |
The first major arterial branch of the aorta is the: | The innominate artery |
The angular artery is the terminal part of the: | Facial Artery |
Which of the following arteries does NOT arise from the subclavian artery? Vertebral, A. Sup thyroid, B. Internal thoracic, C. Thyrocervical trunk (axis), D. Internal mammary | A. Superior thyroid artery. |
What artery is usually the first branch of the external carotid artery? | Superior thyroid artery |
Which of the following is not an artery in the circle of Willis? A. ACA B. MCA C. Ant communicating artery D. Middle communicating artery E. Post Communicating artery | D. Middle communicating artery |
Which of the following arteries arise(s) from the ECA? A. Sup thyroid artery B. Lingual artery C. Facial artery D. Ascending pharyngeal artery E. All of the above | E. All of the Above The external carotid artery has eight branches: The following four branches arise in the carotid triangle: the superior thyroid, lingual, facial and the ascending pharyngeal arteries. |
The prominence of the larynx is formed by the: | B. Thyroid cartilage The thyroid cartilage forms a prominence that is especially visible in tall, thin, socially awkward males. |
The vertebral artery usually arises from the: | A. The Subclavian artery The vertebral artery arises from the dorso-superior aspect of the ascending (first) portion of the Subclavian artery. A not-uncommon variant is the vertebral artery arising directly from the aortic arch. |
The infraorbital artery is a terminal branch of the: | Maxillary artery It creates one of the potential anastomoses with orbital branches that can provide collateral pathways in the event of carotid obstruction. |
The vertebral arteries branch from the subclavian arteries to unite and form the: | Basilar artery The system is called the vertebrobasilar system and is responsible for the circulation to the posterior portion of the brain. |
The first intracranial branch of the internal carotid artery is the: | Ophthalmic artery Even though there is often a branch called the caroticotympanic artery, the ophthalmic artery is regarded as the first major branch of the ICA. It is central to indirect physiological testing. |
The circle of Willis receives its blood supply from which combination of arteries? | Carotid and vertebral arteries This remarkable connection of the carotid and vertebral arteries makes possible the ability of the brain to withstand (sometimes) extracranial carotid occlusion without significant symptoms. |
The three terminal branches of the ophthalmic artery are the: | Nasal, Frontal, and Supraorbital arteries These branches are assessed in the periorbital Doppler examination for carotid artery disease. |
Two of the major branches of the ECA include the: | Superficial temporal and facial arteries The supraorbital, frontal and ophthalmic arteries are all fed by the ICA. The vertebral artery is part of the posterior circulation. |
Intracranial potential collateral arteries include all but the following: A. Ant Comm artery B. Post Comm artery C. Superficial temporal artery D. Leptomeningeal pathways E. Rete mirable | Superficial Temporal Artery The superficial temporal artery is not an intracranial vessel. Leptomeningeal collaterals and the rete mirable ("wonderful net") are potential collateral pathways of lesser importance than the circle of Willis arteries. |
Which of the following is NOT true regarding theICA. Its first major branch is the ophth artery B. It supplies a high-resist system C. It supplies a low-resist system D. It is part of the ant cere system E. It orginates at the carotid bif. | The statement about the internal carotid artery---"It supplies a high-resistance system"---is false. The ICA feeds a low-resistance system. |
The two arteries creating the bidirectional signal observed 60-65 mm deep during trancranial insonation of the temporal window are the: | Middle cerebral and anterior cerebral arteries |
What is the most common anomaly of the circle of Willis? | Absence or hypoplasia of one or both of the communicating arteries. |
Proximal Vessel: Innominate | Branch or Continuation of Vessel: Subclavian |
Proximal Vessel: Subclavian | Branch or Continuation of Vessel: Vertebral |
Proximal Vessel: CCA | Branch or Continuation of Vessel: ICA |
Proximal Vessel: Vertebral | Branch or Continuation of Vessel: Basilar |
Proximal Vessel: ECA | Branch or Continuation of Vessel: Superficial Temporal |
Helical flow with flow separation in the posterolateral aspect of the carotid bulb is a sign of: | Normal flow dynamics Flow separation at the posterior wall of the carotid bulb occurs because the linear momentum of the flow is disrupted by the large sinus and sharp curve at the carotid bulb. flow separation depends on a relative disease-free bulb. |
The most common anatomic variant of the aortic arch is: | A common origin of the innominate and left common carotid arteries. It is by far the most common variant anatomy of the aortic arch, occurring in approximately 22% of individuals. |