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GSSE Anatomy > Upper Limb > Flashcards

Upper Limb Flashcards

1
Q

What type of joint is the sternoclavicular joint?

A

Atypical synovial joint

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2
Q

What anatomy is involved in the sternoclavicular joint?

A

Medial clavicle
Manubrium
1st costal cartilage

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3
Q

What makes the sternoclavicular joint atypical?

A

Saddle shaped, two separate cavities - separated by fibrocartilaginous disc

Atypical because the bone ends are covered by fibrous cartilage rather than hyaline cartilage

Movement occurs in the A-P, vertical planes with some rotation (grinding sliding rotation, protect articular cartilage)
- rotation is passive, 40 degrees with full abduction

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4
Q

List the 4 ligaments surrounding the Sternoclavicular joint capsule the reinforce the stability

A 
Interclavicular
Costoclavicular *****fulcrum, see-saws around this point, very important for stability
Anterior sternoclavicular 
Posterior sternoclavicular 
 - anterior weaker than posterior 
- anterior dislocation more common
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5
Q

Acromioclavicular joint

  • what is the type of joint?
  • what anatomy is involved?
  • what movements occur
A

Small synovial joint
Lateral end clavicle and the acromion
Articular surfaces are covered by fibrocartilage with a fibrocartilage disc in the joint
Moves with the scapula
Movements are passive
The acromion slides to and fro, the centre of rotation being through the conoid ligament

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6
Q

What ligaments reinforce the acromioclavicular joint capsule

A

Acromioclavicular ligament - superior to the joint
Coracoclavicular ligament - important accessory ligament
Trapezoid ligament - transmits forces from the glenoid to the clavicle
Conoid ligament - Centre of rotation

Clavicle fracture between costoclavicular ligament and trapezoid ligament

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7
Q

Trapezius Origin

A

Superior nuchal line
External occipital protuberance
Ligamentum nuchae
Spinous processes CVII to TXII and related ligaments

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8
Q

Trapezius insertion

A

U shaped insertion

  • lateral third clavicle
  • acromion
  • spine of the scapula
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9
Q

Trapezius innervation

A

CNXI (spinal part) and proprioception from C3-4 anterior rami
- not myotomes of the upper limb

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10
Q

Trapezius action

A

Action is rotate the glenoid fossa upward

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11
Q

Deltoid muscle

  1. Shape
  2. Origin
  3. Insertion
A
  1. Large and triangular
  2. Origin mirrors the insertion of the trapezius
    - lateral third clavicle
    - acromion
    - spine of scapula
  3. Deltoid tuberosity of humerus
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12
Q

Deltoid muscle

  1. Innervation
  2. Major function
  3. Other functions
A
  1. Axillary nerve (C5,6) 5cm below the acromion
  2. Abduction - of the arm beyond 15 degrees (supraspinatus does first 15)
  3. Anterior longitudinal fibres assist PM with shoulder flexion
    Posterior longitudinal fibres assist LD with extension
    Intermediate fibres are multipennate and very strong (4 septa from above, 3 septa from below)
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13
Q

Levator scapula

  1. Origin
  2. Insertion
  3. Innervation
  4. Movement
A
  1. Transverse processes of C1-4
  2. Medial border scapula from the superior angle to the root of the spine
  3. Dorsal scapula nerve (C5) and directly from the anterior rami of (C3-4)
  4. Draws scapula up and medial
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14
Q

Rhomboid minor

  1. Origin
  2. Insertion
  3. Innervation
  4. Retract medial border
A
  1. From the lower end of ligamentum nuche and the spines CVII & T1
  2. Inserts into the smooth triangular area at the root of the Spine of the scapula below the levator scapula
  3. Dorsal scapula nerve (C5)
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15
Q

Rhomboid Major

  1. Origin
  2. Insertion
  3. Innervation
  4. Movement
A
  1. From the spines of TII - V and the intervening supraspinous ligament
  2. Inserts along medial border of the scapula down the inferior angle
  3. Dorsal scapula nerve (C5)
  4. Both retract the medial border
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16
Q

Supraspinatus
Origin
Pathway
Insertion

A

From the medial two thirds of the supraspinous fossa
Passes under the acromion
Inserts into greater tuberosity of the humerus
Laterally also blends with the capsule

17
Q

Supraspinatus
Innervation
Movement

A 
Suprascapular nerve (C5,6)
Initiates abduction
18
Q

Infraspinatus

  1. Origin
  2. Pathway
  3. Insertion
A

From the medial two thirds of the infraspinous fossa
Passes posterior to the glenohumeral joint
Inserts on the middle facet of the greater tuberosity

19
Q

Infraspinatus

  1. Innervation
  2. Movement
A 
Suprascapular nerve (C5,6)
Lateral rotation of the shoulder
20
Q 
Teres Minor
Origin 
Uniqueness of muscle
Insertion 
Innervation
Movement
A

From flattened area below the infraglenoid tubercle
Cord like muscle
Insertion greater tubercle of the humerus
Part of rotator cuff
Axillary nerve (C5,6)
Lateral rotation

21
Q 
Teres major 
Origin
Insertion
Innervation 
Movement
Unique anatomy
A

From a large oval area on the lateral border of the scapula
Broad flat tendon attaches to the medial lip of the bicipital groove
Inferior scapular nerve (C6-7)
Medial rotation
The long head of the biceps passes vertically down between teres minor and major (forming various spaces)

22
Q

Suprascapular notch

  • formed into foramen by what
  • what structures pass in and around
A

Transformed into suprascapular foramen by the superior transverse scapular ligament
- if this ligament thickened could cause impingement of suprascapular nerve (therefore unable to abduct first 15 degrees)

Suprascapular nerve passes through the foramen and the artery & vein pass over the ligament then passes around the root of the spine of the scapula

23
Q

Uniqueness of suprascapular nerve

A

Only one to come off the upper trunk of the cervical plexus

24
Q

The quadrangular (quadrilateral) space

  • things that go through
  • borders
A

Transmits the axillary nerve and posterior circumflex humeral artery
Borders:
Upper according to last’s it is subscapularis (but also could be teres minor)
Lateral - humerus
Lower - teres major
Medial - long head of triceps

25
Q

The triangular space/interval (upper medial triangular space in posterior shoulder region)

  • transmits
  • borders
A

Transmits circumflex scapular artery and vein
- scapular flap was based on this artery (?look up bone reconstruction for jaw)

Borders:
Lateral - long head of triceps
Lower - teres major
Upper - ?teres minor/subscapularis??

26
Q

The triangular space/interval (lower lateral triangular space in posterior shoulder region)

  • transmits
  • borders
A

Transmits radial nerve and the profunda brachii artery

Borders: upper teres major, lateral humerus, medial long head triceps

GSSE Anatomy (1 decks)

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