2/17 Flashcards Preview

Final FA review > 2/17 > Flashcards

Flashcards in 2/17 Deck (21):
1

Radial n.
-roots
-where are common injuries
-classic sign

-C5-T1
-midshaft fx of humerus, compression of axilla.
-wrist drop

2

Median n.
-roots
-where are common injuries
-classic sign

-C5-T1
-Supracondylar fx of humerus (proximal lesion); carpal tunnel syndrome and wrist laceration (distal lesion).
-Hand of benediction.

3

Ulnar n.
-roots
-where are common injuries
-classic sign

-C8-T1
-medial epicondyle of humerus (funny bone). Hook of hamate. Guyon canal syndrome.
-Ulnar claw on digit extension.

4

Which brachial plexus terminal nerves do NOT give branches in axilla or upper arm?

Median, Ulnar

5

What innervates:
-lateral flexor digitorum profundus & lateral 2 lumbricals.

median n.

6

What innervates:
-medial flexor digitorum profundus & medial 2 lumbricals.

ulnar n.

7

Atrophy of hypothenar eminence

-ulnar n. lesion

8

Is "clawing" seen w/distal or proximal lesions?

-distal

9

Actin are bound to __ line

Z

10

Myosin are bound to ___ line

M

11

I band =
H band =
A band =

I band = just actin
H band = just myosin
A band = entire length of myosin, stays the same.

12

PTH effect at low, intermittent levels.

-exerts anabolic effects.

13

Serum chemistry in osteoporosis

-normal serum chemistry!

14

What type of bone is lost in osteoporosis?

Trabecular (spongy) (cancellous)
-dorsolumbar vertebral bodies, neck of femur (50/50 trabecular & corticol)

15

What type of bone is lost in hyperparathyroidism?

corticol (your limbs)
-subperiosteal thinning.

16

denosumab

-Tx for osteoporosis
-monoclonal antibody against RANKL

17

osteopetrosis - can lead to marrow fibrosis

-pancytopenia
-extarmedullary hematopoesis.

18

Serum chemistry in osteomalacia

-dec Calcium (leads to inc. PTH which leads to =>
-dec. phosphate
-inc. ALP (hyperactivity of osteoblasts).

19

Serum chemistry in Pagets disease of bone.
-inc. risk for what cancer?

-Ca, Phosphate, PTH = normal
-inc. ALP (after lytic & mixed phase)
-inc. risk of osteogenic sarcoma

20

Pagets: inc. vascularity. How?

-osteoclasts release cytokines that promote prolif of fibroblasts and endothelial cells.
-AV shunts made
-high output cardiac failure

21

Most common location of avascular necrosis?
Which artery feed that location?

Femoral head, fed by medial circumflex femoral art.