Thorax Flashcards
pectoralis major innervation
lateral and medial pectoral nerves
pectoralis major blood supply
pectoral branch of thoraco-acromial artery
pectoralis major action
adduction, medially rotates arm
pectoralis major origin
from clavicle, sternum, costal cartilages
pectoralis minor origin
ribs
pectoralis minor innervation
medial pectoral nerve
pectoralis minor blood supply
thoraco-acromial artery and lateral thoracic artery
subclavius origin
first rib
subclavian innervation
the nerve to subclavius
subclavius action
anchors and depresses clavicle
serratus anterior origin
lateral portion of upper ribs
serratus anterior innervation
long thoracic nerve
serratus anterior blood supply
lateral thoracic artery
serratus anterior action
protraction and rotation of scapula superiorly
muscles innervated by intercostal nerves
external intercostals, internal intercostals, innermost intercostals, transversus thoracis
pleural cavities
on either side of mediastinum; contain lungs and their lining membranes
pleural cavity
space between visceral and parietal pleura
impressions on left lung
groove for arch of aorta and groove for descending aorta
impressions on right lung
groove for brachiocephalic vein, groove for superior vena cava, groove for azygos vein
arterial supply of lungs and pleura
derives from bronchial aa, which are small branches of aorta
pulmonary plexus nerve supply
sympathetic and parasympathetic
sympathetic pulmonary plexus
secreto-inhibitor, bronchodilator, vasoconstrictor
parasympathetic pulmonary plexus
bronchoconstrictor, vasodilator, secreto-stimulant
parietal pleura nerve supply
receives sensory information from phrenic and intercostal nerves (very sensitive to local inflammation)
pleural effusion
excess fluid in pleural cavity
thoracentesis
needle used to aspirate pleural fluid from the costodiaphragmatic recess
internal thoracic artery is _
a branch of the subclavian artery
