SUBMANDIBULAR REGION Sternomastoid m Digastric m Lower border

SUBMANDIBULAR REGION

Sternomastoid m. Digastric m. Lower border of body of mandible Superior belly of omohyoid m. Midline of neck

Muscles of Submandibular (Suprahyoid) Region 1 2 3 4 5 6 Digastric muscle. Stylohyoid muscle. Myelohyoid muscle. Hyoglossus muscle. Geniohyoid muscle. Genioglossus muscle.

Posterior belly of digastric m. Superficial part of submandibular gland Dr. Sherif Fahmy Anterior belly of digastric m.

Stylohyoid m. Submental artery Myelohyoid nerve Posterior belly of digastric m. Hyoglossus m. Myelohyoid m. Anterior belly of digastric m.

Hyoglossus m. Myelohyoid m. Submental vs Submandibular ganglion Lingual n. Posterior belly of digastric m. Deep part of submandibular gland Myelohyoid n Anterior belly of digastric m Submandibular duct Hypoglossal nerve

Myelohyoid m. (cut) Genio-glossus m. Submandibular duct Stylo-glossus m. Lingual nerve Deep part of submandibular gland Hypoglossal nerve Geniohyoid m. Hyoglossus m.

Stylohyoid ligamnent Styloid process Sublingual gl. Genioglossus m. Geniohyoid m. Middle constrictor m. Glossopharyngeal n. First part of lingual artery 3 rd part of lingual artery

Digastric Muscle

Styloid process Mastoid process Fibrous loop Mandible Digastric fossa Posterior belly of digastric m. Stylohyoid m. Intermediet tendon Hyoid bone Anterior belly of digastric m.

Relations of Digastric Muscle

A- Anterior Belly

Superficial Relations of Anterior belly Digastric muscle Superficial part of submandibular gland Dr. Sherif Fahmy Anterior belly of digastric m.

Deep Relations of Anterior belly Digastric Muscle Submental artery Myelohyoid m. Myelohyoid nerve Anterior belly of digastric m.

B- Posterior Belly

Mastoid process Parotid gland Angle of mandible Posterior belly of digastric m. Superficial part of submandibular gland Superficial Relations of Posterior Belly Digastric muscle

Spinal accessory n. Posterior belly of digastric m. Facial art. I. J. V. Occipita l art. Vagus n. Internal carotid art. External carotid art. Hypoglossal n. Deep relations of posterior belly of digastric m.

Relations to Borders of Posterior Belly of Digastric m.

Stylohyoid m

Posterior auricular art. Occipital art. Posterior belly of digastric m.

Myelohyoid Muscle (Diaphragma Oris)

Myelohyoid muscle Myelohyoid line Median raphe Body of hyoid bone

Relations of Myelohyoid M.

Superficial myelohyoid nerve Submental lymph nodes Anterior belly of digastric m. Myelohyoid m. Submental artery Beginning of anterior jugular vein

Dr. Superficial part of submandibular gland

Myelohyoid m. (cut) Deep Genio-glossus m. Submandibular duct Stylo-glossus m. Lingual nerve Deep part of submandibular gland Hypoglossal nerve Geniohyoid m. Hyoglossus m.

Submental Triangle

Submental lymph nodes Anterior belly of digastric m. Myelohyoid m. Submental artery Beginning of anterior jugular vein Body of hyoid bone

Hyoglossus Muscle ()

tongue Dr Hyoglossus m. Greater horn of hyoid m.

Relations of Hyoglossus M.

Superficial Relations of Hyoglossus Muscle Submandibular ganglion Myelohyoid m. Lingual n. Dr Posterior belly of digastric m. Deep part of submandibular gland Submandibular duct Hypoglossal nerve

Dr Styloid process Styloglossus m. Lingual nerve Submandibular ganglion Deep part of submandibular gland Hypoglossal n.

Deep, anterior and posterior relations Stylohyoid ligamnent Styloid process Sublingual gl. Genioglossus m. Geniohyoid m. Middle constrictor m. Glossopharyngeal n. First part of lingual artery 3 rd part of lingual artery

Dr. Sherif Fahmy Genial tubercles Geniohyoid m. Body of hyoid bone

Dr. Sherif Fahmy Hypoglossal nerve Genioglossus m.

Parts, site and extensions • Parts: superficial & deep to myelohyoid muscle. • Site: Upper part is deep to mandible (submandibular fossa) while the lower part in digastric triangle. • Extensions: Anterior: mental foramen. Posterior: Angle of mandible. Superior: myelohyoid line. Inferior: intermediate tendon of digastric muscle.

Parotid gland Posterior belly of digastric m. Superficial part of submandibular gland Dr. Sherif Fahmy Anterior belly of digastric m.

Medial pterygoid m. Body of mandible Lateral surface Inferolateral surface Submandibular lymph nodes Facial artery Facial vein Cervical branch of facial nerve Lateral & inferolateral relations

Submandibular duct Sublingual gland Styloglossus m. Lingual n. Hyoglossus m. Deep part of submandibular gland Hypoglossal n. Myelohyoid m.

Opening of submandibular Frenulum duct Sublingual fold of tongue Dr. Sherif Fahmy

Nerve supply: 1 Sensory 2 Sympathetic. 3 Parasympathetic. Blood supply. By facial vessels.

Lingual n. Submandibular ganglion Myelohyoid m.

DIGASTRIC TRIANGLE (

Digastric m. Lower border of body of mandible

Mandible Posterior belly of digastric m. Stylohyoid m. Anterior belly of digastric m.

Floor of Digastric Triangle

Myelohyoid m. Hyoglossus m.

Contents

Medial pterygoid m. Body of mandible Lateral surface Inferolateral surface Submandibular lymph nodes Facial artery Facial vein Cervical branch of facial nerve Lateral & inferolateral relations

Submandibular ganglion Lingual n. Myelohyoid m. Dr. Posterior belly of digastric m. Deep part of submandibular gland Hypoglossal n.

Sublingual Salivary Gland

Sublingual salivary gland Parotid gland Submandibular salivary gland

Submandibular duct Sublingual gland Lingual n. Deep part of submandibular gland Myelohyoid m.

Submandibular Ganglion