1.71 Innervation of the limbs Flashcards
What are the boundaries of the axilla?
Median - rib 1
Anterior - posterior service of the clavicle
Posterior - superior border of the clavicle up to the caracoid process
When does the subclavian artery become the axillary artery?
When it crosses the lateral margin of rib one
What are the contents of the axilla?
Axillary artery and vein
Infraclavicularpart of thebrachial plexus
Five groups of axillarylymph nodesand the associatedlymphatics
Axillaryfat and areolar tissue
Why are axillary lymph nodes important?
Because cancer from breast tissue can spread to them - anterior nodes
Which muscles make up the border of the axillary?
Anterior - pec major and minor
Lateral - serratus anterior
Posterior - Subscapularis, lat dorsae and theres major
Which nerves are affected in an upper brachial plexus injury?
C5, C6
What loss results from an upper brachial plexus lesion?
Flexion, abudction and lateral rotation of shoulder
Flexion of elbow
Lateral aspect sensory loss
Waiters tip
How is an upper brachial plexus lesion caused?
Violent separation of head and neck
Which nerves are affected in a lower brachial plexus lesion?
C8, T1
What loss results from an lower brachial plexus lesion?
Wrist and finger movements
Sensory loss to medial aspect of arm and forarm and hand
How is an lower brachial plexus lesion caused?
Sudden upward movement of the upper limb
Which nerves are affected in an long thoracic injury?
C5-C7
What loss results from an long thoracic injury?
Serratus anterior, winged scapula
How is an lower long thoracic injury caused?
Stabbing, or surgery to remove lymph nodes or weight lifting
Which nerves are affected in a axillary nerve lesion?
C5, C6
