1. The innervation of the wall of the abdominal cavity a) the anterior branches of thoracic nerves b) the lumbar plexus 2. The lumbar part of the sympathetic trunk 3. The abdominal part of the vagus (10th) nerve 4. The sacral plexus 5. The sacral part of the sympathetic trunk 6. The sacral part of the parasympathetic parts of autonomic division of CNS

1. The Department of Human anatomyThe Department of Human anatomy
NERVES OF ABDOMINALNERVES OF ABDOMINAL
CAVITYCAVITY
andand
NERVES OF THE PELVIS.NERVES OF THE PELVIS.

2. PLANPLAN
 thethe innervations of the wall of theinnervations of the wall of the
abdominal cavityabdominal cavity
a) the anterior branches of thoracic nervesa) the anterior branches of thoracic nerves
b) the lumbar plexusb) the lumbar plexus
 the lumbar part of the sympathetic trunkthe lumbar part of the sympathetic trunk
 the abdominal part of the vagus (10the abdominal part of the vagus (10thth
) nerve) nerve
 the sacral plexusthe sacral plexus
 the sacral part of the sympathetic trunkthe sacral part of the sympathetic trunk
 the sacral part of the parasympatheticthe sacral part of the parasympathetic
parts of autonomic division of CNSparts of autonomic division of CNS

3. Intercostal nervesIntercostal nerves
7 to 11 supply the abdominal wall7 to 11 supply the abdominal wall
THE INNERVATIONS OF THE WALL OF THE
ABDOMINAL CAVITY

4. Phrenic nervesPhrenic nerves
The phrenic
nerves, which
contain motor,
sensory, and
sympathetic fibers
pierce the diaphragm
and supply it (mostly
from the inferior
side), as well as
giving branches to
the peritoneum

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6. TheThe innervations of the wall of theinnervations of the wall of the
abdominal cavityabdominal cavity

7. THE LUMBAR PLEXUSTHE LUMBAR PLEXUS is ais a
nervous plexus in thenervous plexus in the
lumbar region of the bodylumbar region of the body
which forms part of thewhich forms part of the
lumbosacral plexus. It islumbosacral plexus. It is
formed by the ventralformed by the ventral
divisions of the first fourdivisions of the first four
lumbar nerves (L1-L4) andlumbar nerves (L1-L4) and
from contributions of thefrom contributions of the
subcostal nerve (T12),subcostal nerve (T12),
which is the last thoracicwhich is the last thoracic
nerve.nerve.
BRANCHESBRANCHES
a) the iliohypogastric nervea) the iliohypogastric nerve
b) the ilioinguinal nerveb) the ilioinguinal nerve
The lumbar plexus

8. The lumbar partThe lumbar part of theof the
sympathetic trunk is asympathetic trunk is a
continuation of the thoracic part.continuation of the thoracic part.
It comprises 3 to 5It comprises 3 to 5 lumbarlumbar
ganglia,ganglia, ganglia lumbalesganglia lumbales
situated on the anterolateralsituated on the anterolateral
surfaces of the bodies of lumbarsurfaces of the bodies of lumbar
vertebrae next to medial bordervertebrae next to medial border
of the psoas major. They areof the psoas major. They are
associated by means of theassociated by means of the
interganglionic branches thatinterganglionic branches that
cross the vertebral columncross the vertebral column
posterior to the aorta and theposterior to the aorta and the
inferior vena cava.inferior vena cava.
The lumbar part of the sympathetic trunk

9. The lumbar ganglia give
rise to two types of
branches:
the grey rami
communicantes, rami
communicantes grisei
that join all lumbar
spinal nerves;
the lumbar splanchnic
nerves, nervi
splanchnici lumbales

10. The abdominal part of theThe abdominal part of the
vagus(10vagus(10thth
) nerve) nerve
Anterior and posterior vagal trunksAnterior and posterior vagal trunks
from the esophageal plexusfrom the esophageal plexus
supply the anterior and posteriorsupply the anterior and posterior
stomach, respectively. Each trunkstomach, respectively. Each trunk
contains fibers from both right andcontains fibers from both right and
left vagi. The trunks have hepatic,left vagi. The trunks have hepatic,
gastric, and celiac branches.gastric, and celiac branches.
Vagal fibers enter the celiac andVagal fibers enter the celiac and
superior mesenteric plexuses andsuperior mesenteric plexuses and
are distributed to the derivatives ofare distributed to the derivatives of
the foregut and midgut: stomach,the foregut and midgut: stomach,
liver, pancreas, and intestine asliver, pancreas, and intestine as
far as the left colic flexure.far as the left colic flexure.

12.  Coeliac PlexusCoeliac Plexus
 Phrenic PlexusPhrenic Plexus
 Hepatic PlexusHepatic Plexus
 Left Gastric PlexusLeft Gastric Plexus
 Splenic PlexusSplenic Plexus
 Suprarenal PlexusSuprarenal Plexus
 Renal PlexusRenal Plexus
 Superior MesentericSuperior Mesenteric
PlexusPlexus
 Abdominal AorticAbdominal Aortic
PlexusPlexus
 Inferior MesentericInferior Mesenteric
PlexusPlexus
Prevertebral Plexuses

14.  The pelvis is innervatedThe pelvis is innervated
chiefly by the sacral andchiefly by the sacral and
coccygeal spinal nerves andcoccygeal spinal nerves and
by the pelvic part of theby the pelvic part of the
autonomic nervous system.autonomic nervous system.
 Sacral PlexusesSacral Plexuses.. The sacralThe sacral
plexus which lies in front ofplexus which lies in front of
the piriformis, supplies thethe piriformis, supplies the
buttock and lower limb asbuttock and lower limb as
well as structures belongingwell as structures belonging
to the pelvis. It is formed byto the pelvis. It is formed by
the lumbosacral trunk, thethe lumbosacral trunk, the
ventral rami of S1 to 3, andventral rami of S1 to 3, and
the upper division of S4.the upper division of S4.

15.  The pudendal nerveThe pudendal nerve
 The superior gluteal nerveThe superior gluteal nerve
 The inferior gluteal nerveThe inferior gluteal nerve
 The muscular branchesThe muscular branches
 The coccygealThe coccygeal
plexusplexus (S4, 5; Co 1)(S4, 5; Co 1)
supplies the skin over thesupplies the skin over the
coccyx.coccyx.
The short branches
Sacral Plexuses.

16. The inferior
mesenteric plexus
starts out in the
abdomen at the point of
origin of the inferior
mesenteric artery and
passes along the aorta to
the presacral region. As
the plexus drops into the
pelvis, it usually splits up
into a right and left
hypogastric plexus that
lies behind the rectum.

18. The sacral sympathetic chain
is the continuation of the
lumbar chain.
The sacral part of the
parasympathetic nervous
system arises from S2, S3, S4
and supplies the pelvic
structures as well as the left
colic flexure, descending
colon and sigmoid colon.

19. Thank you for attention!Thank you for attention!