| Image | Nerve | Branches | Route | Structures Supplied | Spatial Relationships | Additional Notes | | ----- | ------------------------------------------------------------------------------------------------------------------------------------- | --------------------------------- | ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- | ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------- | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- | | | Intercostal nerves (1-11)<br>T12 = special; subcostal nerve (inf to rib 12) | T1-T6<br><br>T7-T11<br><br>T7-T12 | All of these nerves originate in the spine and travel between the internal and innermost IC muscles (along with the IC veins and arteries (V-A-N from superior to inferior))<br><br>T1-T6<br>\-moves to the lateral/anterior cutaneous skin of the thorax<br>\-provides sensory innervation to the parietal pleura (outer layer of the pleural sac)<br>\-Motor innervation within the IC muscles<br><br>T7-T11<br>At costal margin, these branches continue into the anterior abdominal wall as thoracoabdominal nerves<br><br>T7-T12<br>\-moves to the lateral/anterior cutaneous skin of parts of the abdomen<br>\-motor to abdominal wall<br>\-sensory to peritoneum | T1-T6 =<br>Skin of thorax<br>Pleural sac (parietal pleura)<br>IC muscles (motor innerv.)<br><br>T7-T11 =<br>Anterior abdominal wall<br><br>T7-T12 =<br>Parts of abdomen (cutaneous)<br>Abdominal wall muscles (motor)<br>Perotineum (motor) | All of these nerves originate in the spine and travel between the internal and innermost IC muscles (along with the IC veins and arteries (V-A-N from superior to inferior)) | Arise from VPR of T1-T12<br>(thoracic spinal nerves)<br><br>Part of the somatic NS (provide motor and sensory innervation) <br><br>"T16: CT SP MIC --> MIC jagger needs a Special CT scan on the 16th"<br><br>"T17: CA MA SP --> Travel 712 miles from CA to MA for a Special Person" | | | Pulmonary N. Plexus<br>\-Sympathetic efferent fibers (from sympathetic trunk)<br>\-parasympathetic efferent fubers (from vagus nerve) | | | The trachea, bronchi and lungs | | Part of ulmonary N. plexus at the root of each lung | | | Phrenic | | | | | | | | Vagus | - Parasympathetic efferent fibers | | \-Parasympathetic efferent fibers:<br>Bronchioconstriction, vasodilation and increased glandular secretion | | | | | | | | | | |