Block 1 Quiz Questions

Question 1

Where are the preganglionic sympathetic neuronal cell bodies located that elicit secretion from sweat glands?

Answer 1

Lateral gray horn matter

Question 2

Which nerve branches from the lateral cord?

Answer 2

Musculocutaneous

Question 3

Please refer to the attached image. This is a section through the upper lumbar spinal cord and associated nerves. Which of the following is a type of axons (i.e., nerve fibers) that travel in the nerve at the tip of the arrow? (pointing to ventral root)

Answer 3

Preganglionic sympathetic

Question 4

A 24-year-old woman presents with suspected meningitis, so a lumbar puncture is ordered to test her CSF for infection. To obtain the sample, the tip of the needle must be placed in which of the following locations?

Answer 4

Between pia mater and arachnoid mater

Question 5

Please refer to the attached image. Which meningeal layer gives rise to the indicated structure? (pointing to the filum terminale interim)

Answer 5

Pia mater

Question 6

Please refer to the attached image. Which meningeal layer gives rise to the indicated structure? (pointing to the filum terminale interim)

Answer 6

Pia mater

Question 7

A 48-year-old construction worker presents to his primary care provider with low back pain and sciatica. To help relieve the pain, his physician performs a lumbar epidural steroid injection. Which ligament will the needle pass through as it is inserted into the epidural space?

Answer 7

Ligamentum flavum

Question 8

A 14-year-old girl accidentally flipped her bicycle off a curb, fell, and landed on her face. Although she was wearing a helmet, she landed in such a way that her neck was forced into hyperextension. Which of the following ligaments of the cervical spine was stretched to the greatest degree during her injury?

Answer 8

anterior longitudinal

Question 9

Contraction of which of the following muscles elicits lateral bending of the trunk to the right?

Answer 9

right longissimus

Question 10

A 28-year-old woman was teaching her toddler to use a fork. At one point, the toddler got so excited that he completely missed mom’s mouth and accidently stabbed her in the neck. The attending physician in the emergency department noted that the wound occurred in the submandibular triangle. Which of the following structures is most susceptible to damage from this wound?

Answer 10

facial vein

Question 11

A 67-year-old retired softball pitcher is receiving an injection of local anesthetic at the roots of her brachial plexus to address chronic pain in her shoulder. Which of the following nerves is most susceptible to collateral anesthesia due to proximity?

Answer 11

phrenic

Question 12

In order to assess the facial pulse or compress the artery to slow bleeding, where would you palpate?

Answer 12

Anterior border of masseter at the inferior border of the mandible

Question 13

A 76-year-old woman with osteoporosis presents to the emergency department after injuring her left shoulder and arm in a fall. Physical examination reveals a large hematoma (bruise) and deformity of the upper part of the arm, with exquisite tenderness over the affected area. A radiograph of her shoulder shows a fracture of the surgical neck of her humerus with displacement of the shaft. Which artery is most likely injured?

Answer 13

posterior circumflex humeral

Question 14

Muscles innervated by which two nerves cooperate to produce medial deviation of the wrist?

Answer 14

radial and ulnar

Question 15

Deltoid, coracobrachialis, and pectoralis major all contribute to flexion of the glenohumeral joint. Which nerve innervates pectoralis major AND which root of the brachial plexus contributes to that nerve as well as the nerves that innervate the other two muscles?

Answer 15

Lateral pectoral nerve, C5

Question 16

Following modified radical neck dissection to remove a metastatic tumor, a patient complains that he is unable to fully abduct his right arm above his head. Iatrogenic injury of the spinal accessory nerve (CN XI) is suspected. What other finding on physical exam would support this hypothesis?

Answer 16

Posterior protrusion (winging) of the right scapula

Question 17

A 69-year-old retired carpenter presents with numbness and pain in the middle three digits of his right hand at night, and his thenar eminence is atrophied. Which of the following conditions is likely causing his symptoms?

Answer 17

Compression of the median nerve in the carpal tunnel

Question 18

From which artery does the vessel supplying the posterior forearm directly branch?

Answer 18

common interosseous

Question 19

a 28 year old woman is in a birthing suite being prepped for a lumbar injection for epidural anesthesia. Which of the following lists structures the needle will pass through during this procedure

Answer 19

subcutaneous tissue, supraspinous ligament, and interspinous ligament

Question 20

imagine you’ve been sitting in lecture all day. you feel your neck muscles tense and you lean your head back to stretch. Which muscles are contracted?

Answer 20

longissimus, semispinalis capitis, splenius cervicis, and trapezius

Question 21

Your fantasy football team is in trouble. Your best player just suffered a shoulder separation. which joint was injured

Answer 21

acromioclavicular

Question 22

which muscle do you use to turn a corkscrew (supination) and pull the cork out (elbow flexion)

Answer 22

biceps brachii

Question 23

when you hit your funny bone, which portion of the humerus do you hit, where do you feel the painful “zing” and which nerve transmits the pain

Answer 23

medial epicondyle, medial hand, and ulnar nerve

Question 24

a 93 old champion rock climber presents to his PCP noting that he’s having trouble with his right hand holds. When asked to make an OK sign, he is able to do so normally with the left hand, but the right hand looks more like a pinch. Which pair of muscles is not functioning properly

Answer 24

flexor digitorum profundus and flexor pollicis longus

Question 25

If the caudal equina was injured, what areas would be affected

Answer 25

pelvis and lower limb