AnatoMemory

31 rows · landscape

Trunk Sheet

Every trunk structure on one sheet - back, thorax, and abdominal wall muscles, bones, nerves, and vessels.

Trunk Sheet

31 rows · AnatoMemory · sample of the first 3 rows of each section (11 of 31)

Muscles

Muscles - Trunk Sheet. Every trunk structure on one sheet - back, thorax, and abdominal wall muscles, bones, nerves, and vessels.
MuscleOriginInsertionActionInnervationBlood supply
DiaphragmXiphoid process, lower six costal cartilages, and lumbar vertebrae (crura at L1-L3)Central tendon of the diaphragmContracts and descends to increase thoracic volume - primary muscle of inspiration; increases intra-abdominal pressurePhrenic nerve (C3, C4, C5)Inferior phrenic, musculophrenic, and pericardiacophrenic arteries
Erector spinaeBroad tendon from the sacrum, iliac crest, and lumbar/sacral spinous processesRibs, and transverse and spinous processes of vertebrae up to the skullBilaterally extends the vertebral column and head; unilaterally laterally flexes the trunkDorsal rami of spinal nerves (segmental)Posterior intercostal, subcostal, and lumbar arteries
External intercostalsInferior border of the rib aboveSuperior border of the rib belowElevate the ribs, increasing the thoracic cavity in inspirationIntercostal nerves (anterior rami of T1-T11)Posterior and anterior intercostal arteries

Bones

Bones - Trunk Sheet. Every trunk structure on one sheet - back, thorax, and abdominal wall muscles, bones, nerves, and vessels.
BoneBone typeKey landmarksArticulations
Atlas (C1)Irregular (vertebra)Anterior and posterior arches; Lateral masses; Transverse processes with foramina; Facet for the densOccipital condyles (atlanto-occipital joint); Axis (atlanto-axial joint)
Axis (C2)Irregular (vertebra)Dens (odontoid process); Bifid spinous process; Superior articular facetsAtlas (atlanto-axial joint); C3 vertebra
SacrumIrregular (fused)Sacral promontory; Ala; Anterior and posterior sacral foramina; Median sacral crest; Sacral hiatus; Auricular surfaceL5 vertebra; Hip bones (sacroiliac joints); Coccyx

Nerves

Nerves - Trunk Sheet. Every trunk structure on one sheet - back, thorax, and abdominal wall muscles, bones, nerves, and vessels.
NerveRootsCourseMotorSensory
Intercostal nervesAnterior rami of T1-T11 (T12 = subcostal nerve)Run in the intercostal spaces within the costal groove between the internal and innermost intercostal musclesIntercostal muscles and (lower nerves) the anterolateral abdominal wall musclesSkin and parietal pleura/peritoneum of the thoracic and abdominal walls (dermatomes)
Phrenic nerveC3, C4, C5 (cervical plexus)Descends on the anterior scalene, enters the thorax, and runs anterior to the lung root on the fibrous pericardium to the diaphragmDiaphragm (sole motor supply)Central diaphragm, mediastinal pleura, pericardium, and diaphragmatic peritoneum (referred to the shoulder tip)

Vessels

Vessels - Trunk Sheet. Every trunk structure on one sheet - back, thorax, and abdominal wall muscles, bones, nerves, and vessels.
VesselTypeOriginBranches / tributariesCourseSuppliesDrains
Aorta 1Elastic arteryLeft ventricle of the heartCoronary arteries (ascending); Brachiocephalic trunk; Left common carotid artery; Left subclavian artery (arch); Posterior intercostal, bronchial, esophageal (thoracic); Celiac, superior/inferior mesenteric, renal, gonadal (abdominal)Ascends from the left ventricle, arches to the left over the left main bronchus, descends through the thorax, pierces the diaphragm at T12, and bifurcates at L4The entire systemic circulationnot recorded
Celiac trunk 1Muscular arteryAbdominal aorta (T12)Left gastric artery; Splenic artery; Common hepatic arteryArises from the anterior abdominal aorta just below the aortic hiatus and immediately trifurcatesForegut: stomach, liver, gallbladder, spleen, pancreas (proximal), and abdominal esophagusnot recorded
Common iliac artery 1Muscular arteryAbdominal aorta bifurcation (L4)Internal iliac artery; External iliac arteryRuns inferolaterally from the aortic bifurcation to the pelvic brim, where it divides anterior to the sacroiliac jointPelvis, gluteal region, and lower limbnot recorded

Built from the trunk records of the AnatoMemory reference library.

  1. No "Drains" value is recorded for this structure in the reference data.
  2. No "Supplies" value is recorded for this structure in the reference data.

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