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13 Cards in this Set
- Front
- Back
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Mediastinum division |
Superior and Inferior at sternal angle (T4/5) |
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Superior Mediastinum contains... |
great vessels, trachea, phrenic + vagus nerves |
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Inferior mediastinum subdivisons + components |
Anterior- lymph nodes, sternopericardial ligaments, thymus in infants Middle- pericardium, heart, bifurcation of trachea Posterior- Aorta, sympathetic trunk, vagus nerve, oesophagus, azygous/hemiazygous veins |
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Outflows of SNS/PNS |
SNS- thoracolumbar- T1-L2 PNS- Craniosacral- CN 3, 7, 9, 10 + S2 - S4 |
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Ganglia of SNS/PNS |
SNS- Paravertebral (the sympathetic trunk) / Prevertebral- postganglionic fibres are long PNS- Small ganglia close to viscera (e.g. otic/ciliary) or ganglion cells in plexus (cardiac, pulmonary)- hence postganglionic fibres are short |
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Transmitters used |
At ganglia- ACTH for both At postganglionic fibres SNS- NE for most, but ACTH for sweat glands PNS- ACTH for all |
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Role of CN 3 |
ANS to ciliary muscles and pupils motor to extraoccular muscles |
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Role of CN 7 |
ANS to SMG, SLG, taste (special visceral sensory) motor to muscles of facial expression |
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Role of CN 9 |
ANS to parotid gland and taste (svs) motor to muscles of pharynx sensory to tongue and oropharynx |
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Role of CN 10 |
ANS to lungs, heart, GIT and kidney motor to pharynx and larynx |
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ANS innervation of organs in head |
Parasympathetic- CN3 for eye, CN7 for lacrimal+SMG+SLM, CN9 for parotid Sympathetic- All controlled by T1 |
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Various plexuses- organs and ANS innervation |
Cardiac (heart)- CNX + T2-T5 Pulmonary (lungs)- CNX + T2-T5 Aortic (GI Tract)- CNX + T5 - T11 Renal (kidneys)- CNX + T12 Hypogastric- S2 - S4, L1 - L2 |
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Lymphatic system of the thorax |
Head+Neck --> Jugular Trunk Upper limb --> Subclavian Trunk Hemithorax --> Bronchomediastinal Trunk These drain into the Right Lymphatic Duct on the right, and Thoracic Duct on the left --> Brachiocephalic --> Superior Vena Cava --> Right Atrium |
