Anatomy Flashcards
(23 cards)
Orbicularis oris muscle motor nerve supply
facial nerve
Sensory nerve supply of Lips
• Upper lip: Maxillary nerve ⇨ Infraorbital N.
• Lower lip: Mandibular nerve ⇨ inferior
alveolar N. ⇨ Mental N.
Lips ( Arterial , venous and lumpy node )
Arterial supply: Superior and inferior labial branches of facial artery
Venous drainage: facial vein
Lymph drainage of lips:
Upper lip: preauricular & submandibular Ln.
Lower lip: median part: submental Ln. Lateral parts: submandibular Ln.
Mylohyoid muscle nerve supply
inferior
alveolar nerve (mandibular nerve)
Nerve supply of tongue
Sensory supply
General sensation
Anterior 2/3rd of tongue
Lingual nerve (from mandibular branch of trigeminal nerve)
Taste sensation Chorda tympani nerve from facial nerve
General sensation
Posterior 1/3rd of tongue
Glossopharyngeal nerve + posterior most part by supplied
by vagus nerve
Motor supply • All muscles of tongue are supplied by hypoglossal nerve except palatoglossus which is
supplied pharyngeal plexus via Vagus nerve.
Arterial supply and venous drainage of palate
Hard Palate: Greater palatine and Sphenopalatine arteries (from maxillary artery) •
Soft Palate: Lesser palatine artery (from the maxillary artery), Ascending palatine artery (from the facial artery)
and Ascending pharyngeal artery (from the external carotid artery ECA).
❑ Venous drainage: • pterygoid venous plexus.
Sensory nerve supply the palate and lymphatic drainage
Sensory nerve supply: • Hard Palate: Greater palatine + Nasopalatine nerves (from
Maxillary n.) •
Soft Palate: Lesser palatine (from Maxillary n.) +
Glossopharyngeal nerve
❑Lymphatic drainage: • Some into retropharyngeal LN. ⇨ Deep cervical LN. • Some directly into Deep cervical LN.
Blood supply of parotid gland
Arterial supply: external carotid artery
Venous drainage: retromandibular vein
Nerve supply and lymphatic drainage of parotid gland
Parotid LNs (superficial & deep) → deep cervical L.Ns.
Sensory :Auriculotemporal & great auricular nerves
❑Sympathetic : plexus around external carotid artery
❑Parasympathetic: inferior salivary nucleus in medulla ⇨ pass with glossopharyngeal nerve ⇨ pass with tympanic nerve ⇨ formation of tympanic plexus ⇨ lesser superficial petrosal nerve ⇨ relay in the otic ganglion ⇨ postganglionic fibers ⇨ Sensory :Auriculotemporal & great auricular nerves ❑Sympathetic : plexus around external carotid artery ❑Parasympathetic: inferior salivary nucleus in medulla ⇨ pass with glossopharyngeal nerve ⇨ pass with tympanic nerve ⇨ formation of tympanic plexus ⇨ lesser superficial petrosal nerve ⇨ relay in the otic ganglion ⇨ postganglionic fibers ⇨ Auriculotemporal nerve ⇨ the parotid gland ⇨ the parotid gland
Submandibular gland ( blood , nerve supply and lymphatic drainage )
Arterial supply: • Facial artery
Venous drainage: • common facial & lingual veins
Lymphatic drainage: • submandibular L.Ns → deep cervical L.Ns.
Nerve supply:
Sensory fibers: from lingual nerve
Sympathetic fibers: plexus around facial artery
Parasympathetic fibers: Superior salivary nucleus in pons
⇨ facial nerve ⇨ fibers run with chorda tympani ⇨ join
lingual nerve ⇨ relay in submandibular ganglion ⇨
fibers to supply submandibular and sublingual glands.
Blood supply and Nerve supply of sublingual gland
Arterial supply:
→ Sublingual branch of the lingual artery
→ Submental branch of the facial artery
Same sub mandibular gland 🔽
Venous drainage: • common facial & lingual veins
Lymphatic drainage: • submandibular L.Ns → deep cervical L.Ns.
Nerve supply: Sensory fibers: from lingual nerve
Sympathetic fibers: plexus around facial artery
Parasympathetic fibers: Superior salivary nucleus in pons
⇨ facial nerve ⇨ fibers run with chorda tympani ⇨ join
lingual nerve ⇨ relay in submandibular ganglion ⇨
fibers to supply submandibular and sublingual glands.
Longitudinal muscles of the pharynx
Nerve supply: Cranial root of accessory
nerve through pharyngeal plexus
EXCEPT stylopharyngeus (supplied by
glossopharyngeal nerve).
Nerve supply of Constrictors muscles of pharynx
Nerve supply: All constrictor muscles are supplied by Cranial root of accessory nerve through
pharyngeal plexus,
Inf. Constrictor receives additional branches from recurrent & external laryngeal nerve.
Palatine tonsil blood supply and lymphatic drainage
Arterial supply: (branches from ECA)
a. Maxillary artery
b. Ascending pharyngeal artery
c. Facial artery
d. Lingual artery
• Venous drainage: Para tonsillar veins drains into pharyngeal plexus
• Lymphatic drainage: Jugulo-digastric node
Pharynx blood , nerve supply and lymph node
Arterial supply:
a. Ascending pharyngeal A. ⇦ ECA
b. Ascending palatine A. ⇦ Facial A.
c. Greater palatine A. ⇦ Maxillary A
d. Pharyngeal branch. ⇦ Maxillary A
• Venous drainage: Pharyngeal plexus ⇨ Internal
jugular vein
• Lymphatic drainage: Retropharyngeal & deep
cervical lymph nodes
• Sensory nerve supply:
a. Nasopharynx : Maxillary nerve.
b. Oropharynx : Glossopharyngeal nerve.
c. Laryngopharynx : Vagus nerve
Esophagus blood , nerve supply and lymphatic drainage
Arterial supply:
• Cervical part – Inferior thyroid artery
• Thoracic part – Thoracic aorta
• Abdominal part – Left gastric artery
Venous Drainage:
• Inferior thyroid vein
• Azygous vein
• Left gastric Vein
Lymphatic drainage:
• Upper part – Deep cervical LNs
• Middle part – Mediastinal LNs
• Lower part – Celiac LNs
Nerve Supply:
• Autonomic nerve supply from esophageal plexus
• Esophageal plexus = sympathetic ganglia (Symp. Fibers) + 2 vagi (parasymp. Fibers)
Arterial supply of duodenum
Superior Pancreatico-duodenal artery – from– Gastroduodenal A – (Coelic trunk)
Inferior Pancreaticoduodenal artery – from Sup. Mesenteric A
Additional arteries for DI
Right gastric artery
Supraduodenal artery
Right gastroepiploic artery
Venous and lymphatic drainage of duodenum
Venous drainage
Sup. Pancreaticoduodenal Vein — à»_space; Portal Vein
Inf. Pancreaticoduodenal Vein – à»> Sup. Mesenteric Veinà> Portal Vein
Lymphatic drainage : Pancreaticoduodenal nodes»_space;> hepatic nodes »_space;> Coelic nodes
Blood , nerve supply and lymphatic drainage of Jejunum and Ileum
Arterial supply of jejunum and ileum Branches from Superior Mesenteric A
Venous drainage Superior mesenteric V —-à» Portal V
Lymphatic drainage…. Jejunum & Ileum Mesenteric nodes»_space;»Superior
mesenteric nodes +Aortic nodes
Nerve supply …. Duodenum , Jejunum & Ileum Sympathetic T9-T11
Parasympathetic Vagus nerve (coelic plexus)
Blood supply and lymphatic drainage of the appendix
Arterial supply of the appendix Appendicular artery…… branch from ileocolic artery….. SMA It descends behind the terminal part of the ileum then in the free margin of the mesoappendix giving branches to the appendix.
Venous drainage Appendicular vein ….. Ileocolic vein
Lymphatic drainage Ileocolic and appendicular L. Nodes
Blood , nerve supply and lymphatic drainage of colon
Arterial supply of colon Branches of:
Superior mesenteric A Inferior mesenteric A
Venous drainage of colon Superior mesenteric V —à» Portal V Inferior mesenteric V
Lymphatic drainage of colon
Epiploic L. Nodes
Paracolic L. Nodes
Intermediate L. Nodes
Terminal (Superior and Inferior Mesenteric L. Nodes)
Nerve supply
Sympathetic T11-L1
Parasympathetic Vagus nerve
Blood , nerve supply and lymphatic drainage of the rectum
Arterial supply of rectum
Superior rectal artery……Continuation of inferior mesenteric artery
Middle rectal artery …….Branch from internal iliac artery
Median sacral artery……Aorta (anorectal junction- Poaterior wall)
Inferior rectal artery ……Branch from internal pudendal artery
Venous drainage of the rectum
Superior rectal vein ………continues as inferior mesenteric vein (Portal)
Middle rectal vein …………ends in the internal iliac vein (systemic)
Inferior rectal vein ………. ends in the internal pudendal vein (systemic)
Lymphatic drainage of the rectum Proximal1/2 Into the para-rectal and inferior mesenteric lymph nodes Distal 1/2 Into internal iliac lymph nodes
Innervation The rectum receives sensory and autonomic innervations.
Sympathetic nervous supply L1-2 spinal segments to the rectum is from the lumbar splanchnic nerves and superior and inferior hypogastric plexuses.
Parasympathetic supply is from S2-4 via the pelvic splanchnic nerves and inferior hypogastric plexuses. Visceral afferent (sensory) fibres follow the parasympathetic supply.
Blood, nerve supply and lymphatic drainage of Anal canal ?
Upper endodermal part
Autonomic from (Symp. L1,2 + Paras. S2,3,4 via
pelvic splanchnic nerve), so sensitive to stretch.
Sup. rectal artery from inf. mesenteric artery
•Middle rectal artery from int. illiac artery
▪Sup. rectal vein (ends into inf. mesenteric v.)
(Portal circulation)
▪Middle. rectal vein (ends into Int. iliac vein) (Systemic circulation)
internal iliac LN
Lower ectodermal part
Somatic supply by inferior rectal nerve supply nerve S2,3,4, so sensitive to pain.
Inf. Rectal artery from internal pudendal artery
Inf. rectal vein (ends internal pudendal v.) drainage (Systemic circulation)
superficial inguinal LN
