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46 Cards in this Set
- Front
- Back
Plexuses are formed from?
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Ventral rami of spinal nerves
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Nipples are located at what dermatome?
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T4
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Umbilicus is located at which dermatome?
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T10
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What are the 4 muscles of the pectoral region?
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1. Pectoralis major
2. Pectoralis minor 3. Subclavius 4. Serratus anterior |
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What is the innervation of the PECTORALIS MAJOR?
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Lateral & Medial pectoral nerves
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What are the actions of PECTORALIS MAJOR? (4)
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1. Adduct & medially rotate humerus
2. Draw scapula anterior & inferior 3. Clavicular head flexes humerus 4. Sternoclostal head extends humerus |
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What is the innervation of the PECTORALIS MINOR?
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Medial pectoral nerve
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What are the actions of the PECTORALIS MINOR? (2)
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1. Stabilize scapula
2. Protracts scapula |
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What is the innervation of the SUBCLAVIUS?
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Nerve to subclavius
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What are the actions of the SUBCLAVIUS? (2)
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1. Anchor clavicle
2. Depresses clavicle |
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Breast is located w/ in?
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Superficial fascia
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Breast contains glands which drain by?
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Lacteriferous ducts
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Glands of breast are modified?
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Modified sweat glands
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Breast lymphatic drainage contains subareolar plexus which drains to?
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AXILLARY lymph nodes
(Mainly pectoral) |
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Cutaneous innervation of pectoral region is by which nerves? (2)
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1. Supraclavicular nerves (cervical plexus)
2. Anterior & lateral cutaneous branches of intercostal nerves |
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Which arteries supply the breast? (4)
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1. Anterior intercostals (from internal thoracic)
2. Lateral thoracic 3. Thoracoacronmial 4. Posterior intercostals |
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The apex of the axilla is?
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Space between 1st rib, clavicle & scapula
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What is the anterior wall of the axilla?
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Pectoralis major and minor
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What is the posterior wall of the axilla?
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Latissmus dorsi, teres major & subscapularis
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What is the medial wall of the axilla?
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Seratus anterior & ribcage
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What is the lateral wall of the axilla?
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Intertubercular groove of humerus
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What fascias are found in the axillary region?
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1. Axillary sheath
2. Pectoral fascia 3. Fascia of latissimus dorsi 4. Suspensory ligament (continuous w/ clavipectoral fascia) 5. Brachial fascia 6. Fascia of serratus anterior |
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Main arterial supply to axilla?
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Axillary artery
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What artery branches off 1st part of axillary artery?
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Highest (superior) thoracic artery
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Which arteries branch off 2nd part of axillary artery?
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1. Thoracoacromial artery
2. Lateral thoracic artery |
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Which arteries branch off 3rd part of axillary artery?
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1. Posterior circumflex humoral
2. Anterior circumflex humoral 3. Subscapular artery |
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What are the axillary lymph nodes? (5)
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1. Pectoral nodes
2. Subscapular nodes 3. Lateral (Brachial) nodes 4. Central nodes 5. Apical nodes |
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What are the 5 parts of the brachial plexus?
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1. Roots
2. Trunks 3. Divisions 4. Cords 5. Terminal Branches |
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What are the roots of the brachial plexus?
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ventral rami of spinal nerves: C5, C6, C7, C8, T1
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Which 2 nerves branch off the roots of the brachial plexus?
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1. Dorsal scapular nerve-- C5
2. Long thoracic nerve-- C5, C6, C7 |
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What ventral rami form the SUPERIOR TRUNK of the brachial plexus?
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Superior trunk = C5 & C6
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What ventral rami form the MIDDLE TRUNK of the brachial plexus?
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Middle trunk = continuation of C7
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What ventral rami form INFERIOR TRUNK of brachial plexus?
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Inferior trunk = C8 & T1
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Which 2 trunks of the brachial plexus have NO branches?
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Middle & Inferior trunk
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Which 2 branches come off of superior trunk of brachial plexus?
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1. Nerve to subclavius (C5, C6)
2. Suprascapular joint (C5, C6) |
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What divisions form the LATERAL CORD?
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Anterior divisions of
-Superior trunk -Middle trunk |
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What division forms the MEDIAL CORD?
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Anterior division of Inferior trunk
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What divisions form the POSTERIOR CORD?
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Posterior divisions of all 3:
-Superior trunk -Middle trunk -Inferior trunk |
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Which nerve branches from the LATERAL CORD?
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Lateral pectoral nerve (C5, C6, C7)
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What nerves branch from the MEDIAL CORD? (3)
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1. Medial pectoral nerve (C8, T1)
2. Medial brachial cutaneous nerve (C8, T1) 3. Medial antebrachial cutaneous nerve (C8, T1) |
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Which nerves branch from the POSTERIOR CORD? (3)
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1. Upper subscapular nerve (C5, C6)
2. Thoracodorsal nerve (C6, C7, C8) 3. Lower subscapular nerve (C5, C6) |
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Which terminal branches come from the LATERAL CORD? (2)
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1. Musculocutaneous nerve (C5, C6, C7)
2. Lateral contribution to median nerve |
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Which terminal branches come from the MEDIAL CORD? (2)
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1. Ulnar nerve (C7, C8, T1)
2. Medial contribution to median nerve |
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The median nerve is the terminal branch of which 2 cords?
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Lateral & Medial Cord
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The median nerve is formed from which ventral rami?
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C5-T1
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Which terminal branches come from the POSTERIOR CORD?
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1. Axillary nerve (C5, C6)
2. Radial nerve (C5, T1) |