ANSC 251 - Hell

Nerve that carries sensory and motor fibers from and to viscera —> divides into dorsal and ventral branches

Vagus nerve

Name the abdominal aortic plexuses

• Celiac

• Cranial

• Mesenteric

• Caudal mesenteric

• Adrenal

• Aorticorenal

Where does the dorsal branch of vagus nerve meet and what does it form?

Near the diaphragm + dorsal vagal trunk

Contribution of dorsal vagal trunk

Gives off celiac branch and contributes to celiac + cranial mesenteric plexuses

Where does the ventral branch meet?

Caudal to root of lung

What does the ventral vagal trunk supply?

Liver, stomach and pylorus

Where do the 2 vagal trunks pass through and course?

Esophageal hiatus of diaphragm, coursing along lesser curvature of stomach

Paired nerves innervating viscera and carry fibres of autonomic nervous system + sensory fibres from organs

Splanchnic nerves

True or false, all splanchnic nerves carry the sympathetic fibres

False

Splanchnic nerves that carry parasympathetic fibers

Pelvic splanchnic nerves

Sympathetic trunk and splanchnic nerves

• Major splanchnic n.

• Minor splanchnic n.

• Lumbar splanchnic n.

Celiacomesenteric ganglion and plexuses

• Celiac ganglion

• Cranial mesenteric ganglion

Pelvic plexus: origin of sympathetic and parasympathetic fibres

• S: from hypogastric nerves

• P: from pelvic nerve

Leave sympathetic trunk at 12th or 13th thoracic sympathetic ganglion

a) Minor splanchnic n.

b) Major splanchnic n.

c) Lumbar splanchnic n.

b)

Distributed to aorticorenal, cranial mesenteric and caudal mesenteric ganglia and plexuses

a) Minor splanchnic n.

b) Major splanchnic n.

c) Lumbar splanchnic n.

c)

Passes dorsal to crus of diaphragm, enters abdominal cavity —> adrenal gland —> celiac and cranial mesenteric ganglion + plexuses

a) Minor splanchnic n.

b) Major splanchnic n.

c) Lumbar splanchnic n.

b)

Leave last thoracic and 1st lumbar sympathetic ganglia —> supply nerves to adrenal gland + terminate in celiac and cranial mesenteric ganglia and plexuses

a) Minor splanchnic n.

b) Major splanchnic n.

c) Lumbar splanchnic n.

a)

T or F, lumbar splanchnic n. arise from second to sixth lumbar sympathetic ganglia

False, second to fifth

True or false, adrenal medulla is innervated by major and minor splachnic nerves

True

Name the 8 branches of abdominal aorta + subbranches

• Celiac artery: hepatic, left gastric, splenic

• Cranial mesenteric artery: ileocolic a., jenunal aa., caudal pancreaticoduodenal a.

• Phrenicoabdominal trunk

• Renal a.

• Testicular & Ovarian a.

Branches of portal veins that drain blood from abdominal viscera to the liver

• Gastroduodenal vein

• Splenic vein

• Cranial mesenteric vein

• Caudal mesenteric vein

• Jejunal veins

Gastroduodenal function

Drains pancreas, stomach, duodenum and greater omentum

Splenic function

Drains spleen, stomach, pancreas, greater omentum, lesser curvature of stomach (lfet gastric.)

Cranial mesenteric function

Drains caudal duodenum, jejunum, ileum, right lobe of pancreas

Jejunal function

Drains jejunum

Caudal mesenteric function

Drains cecum and colon

Where do the portal veins enter?

Caudal vena cava leading to the heart

Special capillaries that receive blood from terminal branches of hepatic artery + hepatic portal veins, delivering it into central veins

Hepatic sinusoids

What does the external iliac artery branch into?

Deep femoral artery and femoral artery

Branches of deep femoral artery

Pudendoepigastric trunk (caudal epigastric artery + external pudental artery —> caudal superficial epigastric) and medial circumflex femoral artery

Femoral artery branches

• Superficial circumflex iliac artery

• Lateral circumflex femoral artery

• Proximal caudal femoral artery

• Saphneous artery

• Descending genicular

• Middle caudal femoral artery

• Distal caudal femoral artery

• Popliteal artery —> cranial tibial artery

Passageqay for external iliac artery to leave abdominal cavity and enter thigh

Vascular lacuna

Where is cranial tibial artery located?

Between cranial tibial and long digital extensor mm

Cranial thigh muscles

• Extensors or stifle

• Quadricpes femoris

Cranial thigh muscles: A and N

A: lateral circumflex femoral

N: femoral

Medial thigh muscles: A and N

A: deep femoral (adductors of pelvic limb)

A: caudal femoral (gracilis, adductor, pectineus)

N: obturator

Arterial supply for gracilis

Caudal femoral

Name caudal thigh muscles

Flexors & extensors of stifle:

biceps femoris, semimembranosus, semitendinosus

Cranial muscles of crus

Flexors of tarsus: cranial tibial, peroneus longus

Extensor of digits:

long digital extensor

Caudal muscles of crus

Rotator of stifle: popliteus Extensor of tarsus: gastrocnemius

Flexors of digits: super/deep digital flexors

Caudal thigh muscles: N

Sciatic nerve

Cranial muscles of crus: N

Common fibular

Caudal muscles of crus: N

Tibial

Biceps Femoris (A)

caudal gluteal + distal caudal femoral arteries

Semitendinosus + semimembranosus (A)

caudal gluteal + proximal; middle; distal caudal femoral arteries

Sartorius (A)

iliolumbar + superficial circumflex iliac arteries

Gracilis (A)

deep femoral + proximal; middle; distal caudal femoral arteries

Pectineus + Adductor (A)

deep femoral + proximal caudal femoral arteries

Tensor fasciae latae (A)

lateral circumflex femoral artery

Superficial + middle gluteals (A)

cranial & caudal gluteal + lateral circumflex femoral arteries

Deep gluteal (A)

cranial & caudal gluteal arteries

Internal obturator (A)

medial circumflex femoral + caudal gluteal arteries

Gemelli + Quadratus femoris (A)

Caudal gluteal artery

External obturator (A)

Caudal gluteal + medial circumflex femoral arteries

Quadriceps femoris (A)

Lateral circumflex femoral + superficial circumflex iliac

Iliopsoas (A)

Iliolumbar artery

Cranial tibial + long digital extensor + fibularis longus (A)

Cranial tibial artery

Gastrocnemius + Superficial digital flexor + Deep digital flexor (A)

Distal caudal femoral + popliteal arteries

Popliteus (A)

Popliteal artery