Anatomy

Question 1

Optimal Site for Femoral Nerve Block

Answer 1

-inguinal crease lateral to the femoral artery (targets femoral nerve)

Question 2

Actions of Peroneal Nerves

Answer 2

• superficial n: eversion and innervation of the anterolateral leg and dorsum of foot
• deep n: dorsiflexion

Question 3

What is the function of a T tubule in a muscle?

Answer 3

-T tubules transmit depolarization from the sarcolema to the sarcoplasmic reticulum in rapid, uniform manner during muscle contraction

Question 4

Horizontal transition of rectus abdominus (ie. transverse C section) risks damage to which arteries?

Answer 4

-inferior epigastric arteries enter the rectus abdominus at the level of the arcuate line

Question 5

Location of CSF in Skull

Answer 5

-under arachnoid mater and above pia mater

Question 6

Where the radial nerve can be injured?

Answer 6

• supinator canal: when using screw driver
• axilla: crutch palsy
• midshaft humerus

Question 7

What nerve roots innervate the diaphragm?

Answer 7

-C3, C4, C5

Question 8

What structures are involved in external rotation of shoulder?

Answer 8

• teres minor muscle
• infraspinatous tendon
• both are innervated by the suprascapular nerve

Question 9

What is the omental bursa (lesser sac)?

Answer 9

-the space behind the stomach but in front of the retroperitoneal structures

Question 10

Serratus Anterior Muscle

Answer 10

• when damaged causes winging of scapula

- innervated by long thoracic nerve

Question 11

Where to do thoracentesis

Answer 11

• Midclavicular: 6th-8th rib
• Midaxillary: 8th- 10th rib
• Paravertebral: 10th-12th rib
• always insert above a rib to avoid nerve damage
• gen rule to go two ribs below start of dullness

Question 12

Artery that runs with the radial nerve at the midshaft humerus?

Answer 12

• deep brachial artery

- may be damaged with radial nerve

Question 13

Muscles of the Rotator Cuff

Answer 13

• supraspinatus (abduction)
• infraspinatus (external rotation)
• teres minor (adduction and external rotation)
• subscapularis (adduction and external rotation)
• SITS

Question 14

Most Common Location of Anal Fissure?

Answer 14

-posterior midline distal to dentate line

Question 15

Thoracic Outlet Syndome

Answer 15

• compression of lower trunk of brachial plexus in scalene triangle of neck
• upper extremity numbness, tingling and weakness worse with overhead movement or pitching
• inc. risk with extra cervical rib

Question 16

Where to give butt injection?

Answer 16

• superlateral quadrant

- if give superomedial may cause contralateral hip drop w/ damage to sup. gluteal nerve

Question 17

Bones of Wrist

Answer 17

• Some Lovers Try Positions That They Cannot Handle
• palm faces away from you and it goes proximal thumb to pinkie then distal thumb to pinkie
• scaphoid
• lunate
• triquetrum
• pisiform
• trapezium
• trapezoid
• capitate
• hamate

Question 18

What muscle does arm abduction above 90 degrees?

Answer 18

• trapezius
• damage may cause shoulder droop
• innervated by spinal accessory nerve

Question 19

Signs/Risks of Scaphoid Fracture

Answer 19

• snuff box pain after fall onto outstretched hand

- risk of avascular necrosis

Question 20

What structures pass under the sup. mesentaric artery at it’s bifurcation with the aorta?

Answer 20

• left renal vein

- transverse duodenum (may be occluded with rapid weight loss)

Question 21

What nerve innervates sensation over the suprapubic area and motor to the anterolateral abdominal wall muscles?

Answer 21

• iliohypogastric nerve

- may be damaged with abdominal surgery like an appendectomy

Question 22

S2, S3, S4 innervate?

Answer 22

• pelvic floor muscles

- S2-S4 keep the pee pee off the floor

Question 23

Annular Pancreas

Answer 23

-head of pancreas wraps around descending portion of duodenum