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46 Cards in this Set

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