Anatomy Flashcards
Pectoral Girdle Where is the following on the posterior view: - suprascapular notch - Acromion - supraspinous fossa - infraspinous fossa - spine of scapula
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Pectoral Girdle
Where is the following on the clavicle?
- sternal end
- Acromial end
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- What are the two joints of the clavicle to surrounding bones?
- What type of joint are they?
- What is their innervation?
Acromioclavicular joint = synovial plane joint = C4
Sternoclavicular joint = synovial ball and socket joint = C6
- Which joint is more likely to dislocate, SC or AC?
- A clavicular structure on the lateral 1/3 of the clavicle will make which nerve vulnerable?
- What two things pass through the cervicoaxillary canal?
- AC joint
- Suprascapular nerve
- Brachial plexus and subclavian vessels
- What physiological joint does the scapula move over the thoracic cage on?
- Name the nerves responsible for the following moves of the scapula:
- lateral rotation
- protraction
- retraction
- elevation
- Scapulothoracic joint
- Lateral rotation: CN11 and C5-C7
Protraction: C5-C7
Retraction: CN11 and C3-C5
Elevation: CN11 and C3-C4
Where is the following on the humerus (anterior view)?
- articular head
- greater and lesser tubercles
- anatomical neck
- surgical neck
- shaft
- supraepicondylar ridge
- epicondyles
- capitulum
- trachea
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Where is the following on the humerus (posterior view)?
- deltoid tuberosity
- radial groove
- olecranon fossa
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A fracture in the following parts of the humerus would affect with nerve:
- Neck of the numerus
- Midshaft humerus
- Supraepicondylar ridge
- Axillary nerve
- Radial nerve
- All nerves and arteries
Shoulder joint:
- What type of joint is the shoulder joint?
- What is the glenoid labrum?
- What does it do?
- What two things do the bursa in the joint do?
- Synovial ball and socket joint
- Fibrocartilage ring
- Deepens glenoid fossa and stabilises joint
- Bursa protect overlying tendons from erosion and also some communicate with joint cavity
Shoulder joint
- What around this joint prevents superior dislocation?
- What two things is it made out of?
- What is the innervation of the shoulder joint?
- Where is pain referred to?
- Coracoacromial arch
- Acromion and coracoacromial ligament
- C5-C6
- Into proximal, lateral arm
Shoulder joint capsule
- What two ligaments make up the joint capsule?
- Is dislocation usually anterior or posterior? How does it end up?
- Which nerve is vulnerable in dislocation?
- Coracohumeral ligament and glenohumeral ligament
- Usually anterior and ends up inferior
- Axillary nerve
Name the nerves responsible for the following movements of the shoulder joint:
- Flexion
- Extension
- Abduction
- Adduction
- Lateral rotation
- Medial rotation
- Flexion = C5-C6
- Extension = C7-C8
- Abduction = C5-C6
- Adduction = many + gravity
- Lateral rotation = C5-C6
- Medial rotation = C5-C8
Where are the following features on the elbow:
- coronoid fossa
- medial epicondyle
- capitulum
- trochlea
- head of radius
- radius
- ulna
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Elbow joint - Ulna (lateral view) Where are the following features: - olecranon - trochlea notch - radial notch - coronoid fossa
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Elbow joint:
- What nerve is related to the neck of the radius?
- Which nerve and which artery passes into the forearm from the ulna?
- What 4 things are vulnerable in a fracture or dislocation of the elbow joint?
- Radial nerve
- Median nerve and brachial artery
- Brachial artery, ulnar nerve, median nerve and radial nerve.
Elbow joint capsule
- The elbow joint capsule is weaker in which two parts?
- What 3 ligaments make up the joint capsule? What is the test for two of these?
- What nerve are responsible for flexion?
- What nerves are responsible for extension?
- Anteriorly and posteriorly
- Lateral collateral ligament (varus test)
Medial collateral ligament (valgus test)
Anular ligament - C5-C6
- C7-C8
Posterior pectoral girdle muscles
- What is the overall function of these muscles?
- What are the 5 muscles and what is their nerve supply?
- Attach girdle to axial skeleton
- Levator scapulae = dorsal scapular nerve, C4-C5
Rhomboid minor = dorsal scapular nerve, C4-C5
Rhomboid major = dorsal scapular nerve, C4-C5
Trapezius = CN11
Latissimus dorsi = thoracodorsal nerve, C6-C8
- What are the 3 anterior pectoral girdle muscles and what is their nerve supply?
- What is their overall function?
- Pectoralis major = C5-C8, T1
Pectoralis minor = C8-T1
Serratus anterior = long thoracic nerve, C5-C7 - Attach girdle to ventral thoracic wall
Anterior pectoral girdle muscles Pectoralis major 1. What are the two heads called? 2. What 3 things do both heads do? 3. Which head flexes from extension? 4. Which head extends from elevation? 5. Which head is innervated by the lateral pectoral nerve (C5-C7)? 6. Which head is innervated by the medial pectoral nerve (C8-T1)?
- Clavicular head and sternocostal head
- Adduct, medially rotate and accessory breathing muscles
- Clavicular head
- Sternocostal head
- Clavicular head
- Sternocostal head
Anterior pectoral girdle muscles
Pectoralis minor
1. What does this muscle do?
2. What is it innervated by?
- Depresses scapula
2. C8-T1
Anterior pectoral girdle muscles
Serratus anterior
1. What 2 things does this muscle want to do?
2. What nerve innervates this muscle?
- Protects scapula and holds it close to thoracic wall
2. Long thoracic nerve, C5-C7
Girdle to humerus muscles
- Humerus and girdle muscles include rotator cuff muscles and which other muscle?
- What nerves is it innervated by?
- What 3 things does this muscle do?
- What nerve is vulnerable in a shoulder dislocation or fracture of the neck of the humerus?
- Loss of deltoid would cause what kind of anaesthesia?
- Deltoid muscle
- Axillary nerve, C5-C6
- Flexion, extension and abduction
- Axillary nerve
- Regimental badge anaesthesia
- What are the 4 rotator cuff muscles?
- What is the innervation for all of them?
- What is their overall function?
- What is the additional muscle around here and what is its innervation?
- Supraspinatus, infraspinatus, teres minor and subscapular
- C5-C6
- Stabilise shoulder joint
- Teres major = lower subscapular nerve, C6
Rotator cuff muscles - posterior view (plus one anterior)
What is the innervation and function of each rotator cuff muscle:
1. Supraspinatus
2. Infraspinatus
3. Teres minor
4. Subscapularis
- Supraspinatus = suprascapular nerve = starts abduction
- Infraspinatus = suprascapular nerve and axillary nerve = lateral rotator
- Teres minor = suprascapular nerve and axillary nerve = lateral rotator
- Subscapularis = subscapular nerves = medial rotator
- Apart from the rotator cuff muscles, the other muscle in this area is called what?
- What is it innervated by?
- What are its two functions?
- Teres major
- Lower subscapular nerve, C6
- Medial rotator and adductor
- What are the 2 anterior arm muscles?
- Which one has two heads?
- What are they innervated by?
- What is brachialis in particular innervated by? (C?)
- What two things does biceps brachii do? What does the long head do?
- What does brachialis do?
- Biceps brachii and brachialis
- Biceps brachii (long head and short head)
- Musculocutaneous nerve
- Brachialis = C5-C6
- Flexes elbow and supinates forearm. Long head helps flex shoulder first 30 degrees
- Flexes elbow
Anterior arm muscles:
- What 2 things does the bicipital tendon and aponeurosis protect?
- You can tap on the anterior elbow space for what reflex?
- Median nerve and brachial artery
2. C5-C6 reflex
Posterior arm muscles:
- What is the posterior arm muscle?
- How many heads does it have and what are they called?
- What is it innervated by?
- What space is formed? Which nerve and artery pass through it?
- What interval is formed? Which nerve and artery pass through it?
- Tapping on the posterior elbow space will show which reflex?
- Triceps brachii
- 3 heads: long head, lateral head and medial head
- Radial nerve
- Quadrangular space: axillary nerve and posterior circumflex artery
- Triangular interval: radial nerve and profunda brachii artery
- C7-C8 reflex
Posterior arm muscle: triceps brachii
What is its 2 functions?
- Shoulder extension
2. Elbow extension
- What is the axilla a passage way into the upper limb for?
2. What 6 groups are the axillary lymph nodes arranged into?
- Neurovascular structures
- Infraclavicular nodes
Central nodes
Humeral nodes
Subscapular nodes
Pectoral nodes
Apical nodes
- What are the 4 arteries going from scapula to end of humerus?
- What are the 4 arteries throughout the scapula region?
- Axillary, anterior + posterior circumflex, profunda brachii and brachial
- Suorascapular, dorsal scapular, subscapular and thoracodorsal
Pectoral Girdle Where is the following on the anterior view: - Acromion - coracoid process - glenoid fossa - costal surface - subscapular fossa - medial (vertebral) border - lateral (axillary) border - inferior angle
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- Give 2 benefits of having a plexus…
- Better and finer control of muscles
Damage to a spinal nerve won’t leave entire limb paralysed
Axilla:
- What two things is it bordered by?
- What runs through here?
- What is it filled with?
- What important thing does it contain?
- Pectoral muscles and thoracic cage
- Nerves and vessels of the upper limb
- Fat
- Important lymph node groups
Brachial plexus:
- What are the 5 divisions in order from the neck to the upper limb?
- What nerve roots are involved?
- Roots, trunks, divisions, cords and branches
2. C5-C8, T1
Brachial plexus:
- What are the 3 sections of the trunks?
- What are the 3 sections of the divisions?
- What are the 3 sections of the cords?
- What are the 3 anterior branches?
- What is the posterior branch? What other nerve comes off this?
- Upper, middle and lower
- Anterior, posterior and anterior
- Lateral, posterior and medial
- Musculocutaneous, median and ulnar
- Radial (axillary nerve comes off this)
Brachial plexus
- Which area are the roots and trunks?
- Where are the divisions?
- Where are the cords and branches?
- Neck
- Cervicoaxillary canal
- Axilla
Brachial plexus: musculocutaneous nerve
- What is the root value of this nerve?
- How can damage be caused to this?
- What would be the consequence?
- C5-C7
- Direct damage is rare
- Loss of anterior arm muscles
Brachial plexus: axillary nerve
- What is the root value of this nerve?
- How can damage be caused to this? (2 ways)
- What would be the 2 consequences?
- C5-C6
- Dislocation of shoulder and fractured surgical neck of humerus
- Loss of deltoid and teres minor
Brachial plexus: median nerve
- What is the root value of this nerve?
- How can damage be caused to this?
- What would be the 3 consequences of this?
- C5-T1
- Stab to medial arm
- Loss of most anterior forearm muscles
Thenar muscles
Lumbricals 1 and 2
Brachial plexus: radial nerve
- What is the root value of this nerve?
- How can damage be caused to this? (2 ways)
- What would be the 2 consequences of this?
- C5-T1
- Fracture through humeral shaft and fracture/dislocation of head of radius
- Loss of posterior arm muscles
Loss of posterior forearm muscles
Brachial plexus: ulnar nerve
- What is the root value of this nerve?
- How can damage be caused to this?
- What would be the 2 consequences of this?
- C8-T1
- Fracture of medial humeral epicondyle
- Loss of hand muscles
Loss of 2 anterior forearm muscles
Brachial plexus:
Damage to the long thoracic nerve would cause what?
Winging of the scapula
Brachial plexus
- What are the 4 steps of the route of the brachial plexus?
- The plexus is vulnerable in the neck because it is surrounded by what 2 things?
- What part of the plexus is actually vulnerable there?
- Behind clavicle, around axillary artery, lateral to axillary vein and runs towards humerus
- Scalenus medius and scalenus anterior
- C5 root and upper trunk
The radial nerve (C5-T1) innervates the posterior compartments. Name the roots that innervate the following things:
- Triceps brachii
- Brachioradialis
- Radial wrist extensors
- Posterolateral dermatomes
- Digit extensors
- Triceps brachii = C7-C8
- Brachioradialis = C5-C6
- Radial wrist extensors = C5-C6
- Posterolateral dermatomes = C5-C6
- Digit extensors = C7-C8
Erb’s paralysis
- What are the 2 ways you can get this?
- How does the upper limb appear?
- What 3 positions is the limb in?
- Forced separation of neck from shoulder
Stab wound to neck - “Waiters tip”
- Limb is medially rotated, pronated and extended
Klumpke’s paralysis
- How does it happen?
- Where is the damage?
- How does the hand appear?
- Stretching of arm
- C8-T1 root and lower trunk damage
- First two digits bent
Axillary artery:
- What does it start as?
- What does it continue as?
- What does it anastomose with around the scapula?
- What two branches come off it?
- Subclavian
- Brachial
- Subclavian
- Circumflex humeral and profunda brachii
Radius Where are the following features: 1. Head 2. Tuberosity 3. Shaft with 3 surfaces 4. Styloid
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Ulnar Where are the following features (anterior view): 1. Trochlear notch 2. Tuberosity 3. Shaft with 3 surfaces 4. Head 5. Styloid Where are the following features (lateral view): 1. Olecranon 2. Radial notch 3. Coronoid process
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A fracture or dislocation at the elbow makes what vulnerable?
All 3 main nerves
Radioulnar joints
- Which nerve permits pronation?
- Which 2 nerves permit supination?
- What is the most proximal type of joint? (Elbow)
- What is the membrane in the middle and what does it do?
- What is the type of joint at the end? (Wrist)
- Median nerve
- Radial and musculocutaneous nerve
- Synovial pivot joint
- Interosseous membrane: transmits force to ulna
- Synovial pivot joint