Anterior and Posterior Components of the Arm Flashcards

1
Q

What goes in the radial (spiral) groove of the humerus?

A
  1. Radial Nerve

2. Profunda Brachii Artery

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2
Q

What parts of the Lower Humerus are involved in the elbow joint?

A
  1. Trochlea
  2. Capitulum
  3. Coronoid Fossa
  4. Medial Epicondyle
  5. Lateral Epicondyle
  6. Olecranon Fossa
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3
Q

What parts of the Ulna are involved the elbow joint?

A
  1. Olecranon Process

2. Coronoid Process

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4
Q

What are the hinge joints of the elbow joint?

A
  1. Ulnohumeral Joint

2. Radiohumeral Joint

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5
Q

What movements do the hinge joints in the elbow permit?

A

Flexion and Extension

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6
Q

What are the pivot joints in the elbow joint?

A

Superior/Proximal Radioulnar joint

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7
Q

What movements does the pivot joint in the elbow permit?

A

Pronation and Supination

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8
Q

What are the Ligaments in the elbow joint?

A
  1. Anular Ligamnet
  2. Ulnar Collateral Ligament
  3. Radial Collateral Ligament
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9
Q

What is the shape of the angular ligament and what is its function?

A
  1. Donut Shape
  2. Keeps the head of the radius against the ulna
  3. Allows for pronation and supination
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10
Q

What is the structure of the Ulnar Collateral Ligament and its function?

A

3 Bands: Inferior, Anterior, Posterior

Function: Stabilise the ulna and keep it close to the humerus

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11
Q

What Muscles are in the Anterior Compartment of the arm?

A

The Flexors:

  1. Biceps Brachii
  2. Brachialis
  3. Coracobrachialis
  4. Brachioradialis
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12
Q

What are the origins of Biceps Brachii?

A
  1. Coracoid process of Scapula

2. Supraglenoid tubercle of Scapula

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13
Q

Where does the Biceps Brachii Attach?

A
  1. Radial Tuberosity

2. Becomes the Bicipital Aponeurosis

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14
Q

What is the nerve supply to the Biceps Brachii?

A

Musculocutaneous Nerve

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15
Q

What are the origins of Brachialis?

A

Lower half of the Humerus

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16
Q

Where does the Brachialis Attach?

A

Ulnar Tuberosity

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17
Q

What is the nerve supply of the Brachialis?

A

Musculocutaneous Nerve

18
Q

What are the origins of Coracobrachialis?

A

Coracoid Process of Scapula

19
Q

Where does the Coracobrachialis attach?

A

Midshaft of the Humerus

20
Q

What is the nerve supply of the Corachobrachialis?

A

Musculocutaneous Nerve

21
Q

What are the origins of Brachioradialis?

A

Lateral Supracondyle Ridge

22
Q

Where does Brachioradialis attach?

A

Distal Styloid Process of the Radius

23
Q

What is the nerve supply to the Brachioradialis?

A

Radial Nerve

24
Q

What muscles are in the Posterior Compartment of the Arm?

A
  1. Triceps

2. Anconeus

25
Q

What are the origins of the Triceps?

A
  1. Scapula
  2. Lateral border of Upper Humerus
  3. Lower Half of Humerus
26
Q

Where does the Triceps attach?

A

Olecranon

27
Q

What is the nerve supply to the Triceps?

A

Radial Nerve

28
Q

What are the origins of the Anconeus?

A

Lateral Epicondyle

29
Q

Where does Anconeus attach?

A

Dorsal Proximal Ulna

30
Q

What is the nerve supply to the Anconeus?

A

Radial Nerve

31
Q

What is the blood supply to the arm?

A
  1. Axillary Artery (all 3 parts)
  2. Brachial Artery
  3. Profunda Brachii Artery
32
Q

What is the venous drainage of the arm?

A
  1. Cephalic Vein
  2. Basilic Vein
  3. Median Cubital Vein
  4. Axillary Vein
33
Q

What is the nervous supply to the arm?

A

Brachial Plexus–> Mainly:

  1. Axillary Nerve
  2. Radial Nerve
  3. Median Nerve
  4. Musculocutaneus Nerve
  5. Ulnar Nerve
34
Q

What are Dermatomes?

A

Parts of skin on the arm supplied by a single root of the brachial plexus

35
Q

What is the main concern if someone has fractured their surgical neck of humerus?

A

Damage to Axillary Nerve

36
Q

How do you check if the Axillary Nerve is still functional?

A

Feel the regimental patch area on the skin–> Axillary Nerve Sensory Innervation

37
Q

What is the main concern if someone has fractured their midshaft of humerus?

A

Damage to the Radial Nerve

38
Q

How can you tell if someone has injured their Radial Nerve?

A

The Patient will present with wrist drop

39
Q

What is the main concern if someone has a ruptured tendon on the upper arm?

A

The long head of biceps is damaged

40
Q

What is Volkmann’s Contracture?

A
  1. The patient is unable to extend the hand at the wrist even when extensors are activated
  2. The forearm muscles in the flexor compartment are short and fibrotic