COMSAE PHASE 1 FORM 114 Actual
EXAM PRACTICE 250 QUESTIONS
|ORIGINAL QUESTIONS & ANSWERS
|DETAILED RATIONALES |HINTED
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1. A patient has difficulty abducting the arm from 15° to 90°
following an axillary nerve injury. Which muscle is primarily affected?
A. Supraspinatus
B. Deltoid
C. Teres major
D. Latissimus dorsi
E. Pectoralis major
Answer: B. Deltoid
The deltoid is the primary abductor of the arm from approximately
15° to 90° and is innervated by the axillary nerve.
2. Injury to the long thoracic nerve most directly causes weakness of
which movement?
A. Shoulder adduction
B. Elbow flexion
C. Scapular protraction
D. Forearm supination
E. Wrist extension
,Answer: C. Scapular protraction
The long thoracic nerve innervates serratus anterior, which protracts
the scapula and holds it against the thoracic wall.
3. A patient develops hoarseness after thyroid surgery. Injury to
which nerve is most likely responsible?
A. Hypoglossal nerve
B. Internal laryngeal nerve
C. Recurrent laryngeal nerve
D. Glossopharyngeal nerve
E. Phrenic nerve
Answer: C. Recurrent laryngeal nerve
The recurrent laryngeal nerve supplies most intrinsic muscles of the
larynx and is vulnerable during thyroidectomy.
4. Which structure passes through the foramen rotundum?
A. Mandibular nerve
B. Maxillary nerve
C. Ophthalmic nerve
D. Middle meningeal artery
E. Facial nerve
Answer: B. Maxillary nerve
The maxillary division of CN V passes through the foramen rotundum.
5. Which structure passes through the foramen ovale?
A. V1
B. V2
C. V3
D. CN VII
E. CN IX
,Answer: C. V3
The mandibular division of the trigeminal nerve exits the cranial
cavity through the foramen ovale.
6. A fracture of the surgical neck of the humerus most threatens
which nerve?
A. Radial
B. Median
C. Ulnar
D. Axillary
E. Musculocutaneous
Answer: D. Axillary
The axillary nerve travels around the surgical neck of the humerus
with the posterior circumflex humeral artery.
7. Which muscle initiates shoulder abduction?
A. Deltoid
B. Supraspinatus
C. Infraspinatus
D. Teres minor
E. Subscapularis
Answer: B. Supraspinatus
Supraspinatus initiates the first approximately 15° of abduction
before the deltoid becomes dominant.
8. A patient cannot oppose the thumb after an injury near the wrist.
Which nerve is most likely injured?
A. Ulnar
B. Radial
C. Median
, D. Axillary
E. Musculocutaneous
Answer: C. Median
The recurrent branch of the median nerve innervates the thenar
muscles responsible for thumb opposition.
9. Which structure is located in the posterior mediastinum?
A. Thymus
B. Heart
C. Esophagus
D. Ascending aorta
E. Pulmonary trunk
Answer: C. Esophagus
The posterior mediastinum contains the esophagus, descending
thoracic aorta, thoracic duct, azygos system, and sympathetic trunks.
10. The thoracic duct normally drains lymph from which region?
A. Right upper limb only
B. Right side of head and neck only
C. Entire body below the diaphragm and left upper quadrant
D. Right thorax only
E. Heart only
Answer: C. Entire body below the diaphragm and left upper
quadrant
The thoracic duct drains most of the body and empties into the left
venous angle.
11. Which embryologic structure gives rise to the neural crest?
A. Endoderm
EXAM PRACTICE 250 QUESTIONS
|ORIGINAL QUESTIONS & ANSWERS
|DETAILED RATIONALES |HINTED
COMPLETE EXAM PREP GRADED
A+*INSTANT DOWNLOAD PDF
1. A patient has difficulty abducting the arm from 15° to 90°
following an axillary nerve injury. Which muscle is primarily affected?
A. Supraspinatus
B. Deltoid
C. Teres major
D. Latissimus dorsi
E. Pectoralis major
Answer: B. Deltoid
The deltoid is the primary abductor of the arm from approximately
15° to 90° and is innervated by the axillary nerve.
2. Injury to the long thoracic nerve most directly causes weakness of
which movement?
A. Shoulder adduction
B. Elbow flexion
C. Scapular protraction
D. Forearm supination
E. Wrist extension
,Answer: C. Scapular protraction
The long thoracic nerve innervates serratus anterior, which protracts
the scapula and holds it against the thoracic wall.
3. A patient develops hoarseness after thyroid surgery. Injury to
which nerve is most likely responsible?
A. Hypoglossal nerve
B. Internal laryngeal nerve
C. Recurrent laryngeal nerve
D. Glossopharyngeal nerve
E. Phrenic nerve
Answer: C. Recurrent laryngeal nerve
The recurrent laryngeal nerve supplies most intrinsic muscles of the
larynx and is vulnerable during thyroidectomy.
4. Which structure passes through the foramen rotundum?
A. Mandibular nerve
B. Maxillary nerve
C. Ophthalmic nerve
D. Middle meningeal artery
E. Facial nerve
Answer: B. Maxillary nerve
The maxillary division of CN V passes through the foramen rotundum.
5. Which structure passes through the foramen ovale?
A. V1
B. V2
C. V3
D. CN VII
E. CN IX
,Answer: C. V3
The mandibular division of the trigeminal nerve exits the cranial
cavity through the foramen ovale.
6. A fracture of the surgical neck of the humerus most threatens
which nerve?
A. Radial
B. Median
C. Ulnar
D. Axillary
E. Musculocutaneous
Answer: D. Axillary
The axillary nerve travels around the surgical neck of the humerus
with the posterior circumflex humeral artery.
7. Which muscle initiates shoulder abduction?
A. Deltoid
B. Supraspinatus
C. Infraspinatus
D. Teres minor
E. Subscapularis
Answer: B. Supraspinatus
Supraspinatus initiates the first approximately 15° of abduction
before the deltoid becomes dominant.
8. A patient cannot oppose the thumb after an injury near the wrist.
Which nerve is most likely injured?
A. Ulnar
B. Radial
C. Median
, D. Axillary
E. Musculocutaneous
Answer: C. Median
The recurrent branch of the median nerve innervates the thenar
muscles responsible for thumb opposition.
9. Which structure is located in the posterior mediastinum?
A. Thymus
B. Heart
C. Esophagus
D. Ascending aorta
E. Pulmonary trunk
Answer: C. Esophagus
The posterior mediastinum contains the esophagus, descending
thoracic aorta, thoracic duct, azygos system, and sympathetic trunks.
10. The thoracic duct normally drains lymph from which region?
A. Right upper limb only
B. Right side of head and neck only
C. Entire body below the diaphragm and left upper quadrant
D. Right thorax only
E. Heart only
Answer: C. Entire body below the diaphragm and left upper
quadrant
The thoracic duct drains most of the body and empties into the left
venous angle.
11. Which embryologic structure gives rise to the neural crest?
A. Endoderm
