Unit 8 & Practical

​Practical Questions & Unit 8

Multiple Choice

You are playing football and sustain an injury to the elbow. A player on the opposite team applied a pressure to the lateral aspect of the arm. What ligament was likely injured?

• Radial Collateral Ligament

• Ulnar Collateral Ligament

• Annular Ligament of the radius

• Anterior Fibers: resist extension and vaLgus stress

• Posterior Fibers- limits flexion

• Transverse fibers: limits valgus/increases stability

​vaLgus- LATERAL force - injury to medial aspect

varus- Medical force- injury to later aspect

*this comes back in the knee ​

Multiple Choice

A person comes in with arm pain and is found to have a blood clot in the radial collateral artery, because of anastomoses, blood supply is not lost to that area because of which artery?

• radial recurrent artery

• common interosseous artery

• anterior ulnar recurrent artery

• posterior ulnar recurrent artery

​SIMR

PAIR​

PAPA​

​<Superficial Ulnar collateral

<Inferior Ulnar collateral ​

Multiple Choice

The Axillary Artery becomes the Brachial artery where?

• After the inferior border of Teres Minor

• After the inferior border of teres major

• Inferior border of lat dorsi

• superior border of teres major

Multiple Choice

What are the borders of the cubital fossa

• S: line between epicondyles

  L: medial border of brachioradialis

  M: Lateral border of pronator teres

• S: line between epicondyles

  L: lateral border of pronator teres

  M: Medial border of brachioradialis

• S: median cubital vein

  L: medial border of brachioradialis

  M: lateral border of pronator teres

• S: medican cubital being

  L: lateral border of brachioradilais

  M: Median border of pronator teres

Multiple Choice

What are the contents of the cubital fossa

• Terminal of brachial artery, start of radial/ulnar arteries, Biceps brachii tendon, and median nerve

• End of brachial a. start of radial/ulnar aa. brachioradialis tendon, median n.

• end of brachial a. start of radial/ulnar aa., biceps brachii tendon, musculocutaneous n.

• end of brachial a. start of radial/ulnar aa. biceps brachii tendon ad median n.

Multiple Choice

You want to draw blood for a patient, upon inspection of the cubital fossa, you note the a large, perpendicular vessel on the medical aspect of the arm, which vessel is this?

• Basilic v.

• Cephalic v.

• median cubital vein

• ulnar vein

Multiple Choice

Which of the following is found in the posterior compartment of the arm

• Brachialis m

• musculocutaneous n

• radial n.

• biceps brachii

  m

Primary movement of the posterior compartment ?? BONUS QUESTION ​

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​Hello :)

Posterior Comparment of the arm

: Triceps brachii (3 heads)

Radial n. ​

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Multiple Choice

What provides the innervation of the entire anterior compartment of the arm?

• radial n

• musculocutaneous n

• ulnar n

• median n

​Anterior Compartment of the arm: Biceps brachii, (LH and SH), brachialis m, brachial artery, musculocutaneous n

Fill in the Blanks

What is the blood supply of Latissimus dorsi?

​Thoracodorsal a., post

branch of post intercostal

a., & lumbar a.

Fill in the Blanks

What are the 2 branches of the subscapular a?

Thoracodorsal a and Circumflex Scapular a​

Fill in the Blanks

What are the actions of Iliocostalis cervicis?

​Unilaterally: Ipsilateral SB spine

Bilaterally: extends spine

For this type of question on the practical its ok if you don't know exactly what muscle it is ​since they all do very similar actions, so use the question to your advantage

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Also don't forget to include uni/bilateral & OC/CC actions​

Fill in the Blanks

What is the innervation of Pectoralis minor?

​Medial pectoral n. (C8, T1)

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Make sure you write nerve root levels for innervation​

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Fill in the Blanks

What are the actions of Serratus anterior?

​Upward rotation & lateral slide of scapula; prevents scapular winging

Fill in the Blanks

What is the innervation of Supraspinatus?

​Suprascapular n. (C4,C5,C6)

Fill in the Blanks

What is the distal attachment of the Deltoid?

​Deltoid tuberosity

Fill in the Blanks

What attaches to the posterior aspect of the conoid tubercle of the clavicle?

​Conoid portion of the Coracoclavicular ligament

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Don't forget about the ligaments

Fill in the Blanks

What are the actions of the lower Trapezius?

​scapular upward rot & downward slide

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Make sure you write what body part is doing the action ie Scapular​ rotation or flexes the shoulder

Fill in the Blanks

What is the function of the ligaments in green?

​Limit contralateral side bending

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Don't forget they can tag models​

Multiple Choice

What tendon attaches to the Radial Tuberosity?

• biceps brachii

• Brachialis

• Triceps Brachii

• Coracobrachialis

​biceps brachii

Multiple Choice

What is the most medial muscle of the suboccipital triangle?

• Rectus capitus posterior minor

• Rectus capitus posterior major

• Obliquus capitus inferior

• Obliquus capitus superior

​Rectus capitus posterior minor

Multiple Choice

Which of the following is an action of the long head of the Triceps brachii?

• Humerus adduction

• Shoulder flexion

• Shoulder extension

• Humerus abduction

​Extends the elbow & adducts the humerus​

​Long head attaches to the infraglenoid tubercle of scapula, therefore it adducts the shoulder

Multiple Choice

After a traumatic fall a patient is unable to abduct, externally rotate, and flex the shoulder. Which injury is MOST LIKELY to cause these deficits?

• C5 & C6 root avulsion

• laceration of posterior cord

• Axillary n compression

• Inferior trunk impingement

​C5 & C6 root avulsion- unable to abduct, externally rotate, and flex the shoulder

​Abduct- supraspinatus, deltoid

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Ext rot- Infraspinatus, T minor, deltoid

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Flex- ​deltoid, coracobrachialis, biceps

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​​post cord & axillary n- wouldn't explain complete shoulder flexion deficit

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inferior trunk- wouldn't explain any of the deficits​

Multiple Choice

A patient has difficulty fully abducting his shoulder and extending his elbow. Additionally he has lost sensation to his lateral shoulder, posterior arm & forearm and dorsal aspect of the hand & digits 1-3 . What structure is MOST LIKELY injured?

• Axillary n

• Radial n

• Posterior cord

• Medial cord

​Posterior cord-

abducting arm (Deltoid= axillary)

extending his elbow (Triceps= radial)

​Lateral shoulder sensation = axillary

Posterior arm sensation = radial

Multiple Choice

A patient presents with loss of sensation to the lateral forearm and weakness of the Pec major, Coracobrachialis, Biceps, Brachialis and some of the wrist flexors, however the rotator cuff muscles have full strength. Where is the lesion? 

• Lateral cord

• Superior trunk

• C5 & C6 roots

• Muculocutaneous n

​Lateral Cord Weakness of the Pec major, Coracobrachialis, Biceps, Brachialis and some of the wrist flexors, however the rotator cuff muscles have full strength

​Start with sensation loss then look at weakness.

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Superior trunk & C5/6​- RC intact

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Musc Cut- won't explain Pec weakness​

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​ Questions?

Texas tech has cadaver images too​