breast and autonomics
TRANSCRIPT
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The Breast
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- 2nd or 3rd rib superiorly
- inframammary folds
6th or 7th ribs inf.- sternum medially
- AAL or MAL laterally
and ant. Axillary fold
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Breast
Blood Supply
internal mammary artery
posterior intercostal arteriesaxillary arteries
highest thoracic
lateral thoracic
thoracoacromial
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Breast
Venous Drainageperforating branches of the internal
mammary vein
tributaries to the axillary vein
perforating branches of the posterior
intercostal veins
* Circulus venosus- venous anastomotic
circle around the nipple
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Breast
Sensory innervation of the breast
lateral and anterior cutaneous branches
of the 2nd to 6th intercostal nervesAnterior and medial branches of the
supraclavicular nerve
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Lymphatic Drainage
axillary lymph node groups axillary vein group(lateral group)- 4-6 lymph
nodes that lie medial or posterior the axillary
vein
external mammary group(ant. or pectoral
group)- 4-5 lymph nodes @ the lower border
of the pectoralis minor
scapular group(posterior or subscapulargroup)- 6-7 lymph nodes near the posterior
wall of the axilla
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Lymphatic drainage cont.
central group- 3-4 large nodesembedded in the fat of the axilla
behind the pectoralis muscle
subclavicular group(apical group) 6-12lymph nodes partially post. And
partially above the pectoralis minor
interpectoral or Rotters group- 1 to 4nodes
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Autonomic Nervous System
Innervation of involuntary structures
found in the central and peripheral nervous
system
Divided into 2 parts:
Sympathetic nervous system
Parasympathetic nervous system
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Sympathetic Nervous System
Prepares the body for emergency
Efferent Fibers
Cell bodies of the sympathetic neurons -LateralHorn of Gray matter of the spinal cord from T1
to L2
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Sympathetic
Nervous System
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Parasympathetic
Nervous
System
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Parasympathetic Nervous System
Myelinated axons leave the spinal cord in
the ant. nerve roots of the correspondingspinal nerves
They then leave the sacral nerves and
form the Pelvic Splanchnic NervesCranial preganglionic fibers relay in the
pterygopalatine, submandibular and otic
ganglia.Preganglionic fibers of the pelvic
splanchnic nerve relay in the ganglia in
the pelvic plexus