CSFA Anatomy & Physiology 5

Question 1

During a femoral hernia repair, which structure forms the medial boundary of the femoral ring and must not be cut unless a corona mortis is present?

Accepted Answer

Lacunar (Gimbernat's) ligament

Answer

The lacunar ligament forms the sharp medial boundary of the femoral ring; it is normally incised to reduce an incarcerated femoral hernia but may contain an anomalous obturator artery (corona mortis).

Question 2

The celiac trunk typically divides into three branches immediately after its origin from the aorta; which vessel is NOT one of them?

Accepted Answer

Superior mesenteric artery

Answer

The celiac trunk gives rise to the left gastric, splenic, and common hepatic arteries; the superior mesenteric artery arises separately from the aorta below the celiac trunk.

Question 3

Which fascial layer encloses the thyroid gland and forms a surgical plane separating it from the strap muscles?

Accepted Answer

Pretracheal fascia

Answer

The pretracheal (middle cervical) fascia envelops the thyroid gland as a true surgical capsule and forms the anatomical plane used when retracting strap muscles during thyroidectomy.

Question 4

Cushing's triad (hypertension, bradycardia, irregular respirations) indicates dangerous elevation of intracranial pressure through compression of which brainstem structure?

Accepted Answer

Medulla oblongata

Answer

Rising ICP compresses the medulla oblongata, stimulating vasopressor and cardiovascular control centers, producing the classic Cushing's triad as a late sign of herniation.

Question 5

Which structure passes through the carpal tunnel along with the nine flexor tendons and is most vulnerable to compression in carpal tunnel syndrome?

Accepted Answer

Median nerve

Answer

The median nerve passes through the carpal tunnel and is compressed by swelling within the tunnel, causing the sensory and motor deficits of carpal tunnel syndrome.

CSFA - Certified Surgical First Assistant Practice Test

CSFA - Certified Surgical First Assistant Practice Test

CSFA Anatomy & Physiology 5