Brachial Plexus Flashcards
What does the dorsal scapular nerve innervate?
- Levator scapulae
- Rhomboid minor
- Rhomboid major
Direct branches from anterior rami of brachial plexus?
- Dorsal scapular nerve
- Suprascapular nerve
- Nerve to subclavius
- Long thoracic nerve
What does the suprascapular nerve innervate?
- Supraspinatus
2. Infrapinatus
What does the nerve to subclavius innervate?
- Subclavius muscle
What does the long thoracic nerve innervate?
- Serratus anterior
C5, C6, C7
Where are the roots of the brachial plexus found?
Emerge between anterior and middle scalene (interscelene groove)
Where are the trunks of the brachial plexus found?
In the posterior triangle of the neck
Where are the divisions of the brachial plexus found?
Behind the clavicle
Where are the cords of the brachial found?
In axilla
What are the 5 terminal nerves of tech brachial plexus ?
- Musculocutaneous
- Median
- Ulnar
- Radial
- Axillary
What nerves does the lateral cord give rise to?
- Lateral pectoral
- Musculocutaneous
- Median nerve (lateral root)
What does the median cord give rise to?
- Median nerve - median root
- Medial pectoral
- Medial ante brachial cutaneous
- Medial brachial cutaneous
- Ulnar nerve
What does the posterior cord give rise to ?
- Upper subscapular nerve
- Thoracodorsal nerve
- Lower subscapular nerve
- Axillary nerve
- Radial nerve
What branches form from the roots of the brachial plexus?
- Dorsal scapular nerve (C5)
2. Long thoracic nerve (C5 - C7)
What does the long thoracic nerve innervate?
Serratus anterior
Occasions in which the long thoracic nerve is damaged ?
- Radical mastectomy
2. Thoracic surgery
What are the branches from the upper trunk of the brachial plexus?
- Suprascapular nerve
2. Nerve to subclavius
Is the suprascapular nerve above or below the superior transverse scapular ligament?
Below
What does the suprascapular nerve innervate?
- Supraspinatus
- Shoulder joint
- Infraspinatus
What does the lateral pectoral nerve innervate?
- Pectoralis minor
2. Pectoralis major
What does the musculocutaneous innervate?
- Coracobrachialis
- Biceps brachi
- Brachialis
What does the medial pectoral nerve innervate?
- Pectoralis minor
2. Pectoralis major
What does the medial brachial cutaneous nerve innervate?
Skin on the medial side of the arm
What does the medial ante brachial cutaneous nerve innervate?
Skin on medial side of forearm
Ulnar nerve roots
C8, C7 and T1
Musculocutaneous nerve roots
C5-7
Axillary nerve roots
C5 and C6
Lies at first behind axillary artery and in front of Subscapularis and passes downward to the lower border of muscle
Radial nerve roots
C5, C6, C7, C8 and T1
Median nerve roots
C5,C6,C7 (lateral cord) and C8 and T1
The dorsal cutaneous branch of ulnar nerve
- Ulnar half of dorsum of the hand
2. Medial 2 1/2 Fingers (3rd,4th and 5th fingers) as far as the DIPJ
