BATCH 23 MEDICAL UST #دفعة الدكتور حسن العريفي

Thyroglossal cyst "congenital" Treatment : excision by sistrunk's operation

Toxic "malignant" Using radio isitope studies

Nerves related to thyroid gland * superior laryngeal nerve .. (High tone .. Cricothyroid muscle .. Tension of vocal cords)

venous drainage

Arterial supply

Deep facial layer :- 1. Middle/pretracheal fascia .. بتلف ال trachea + thyroid 2. Deep/prevertebral fascia .. بتلف ال vertebrea 3. Carotid fascia .. بتلف ال carotid sheath (IJV + CCA + Vagus n.) 4. Investing fascia .. بتلف ال strap muscles

Posterior triangle Contents : 1. Vessels Occepital a. + transverse cervival a. + suprascapular a. + subclavian a. + external jugular v. 2. Nerves Accessory nerves + brachial plexus + cervical nerves 3. Muscles Inferior belly of omohyoid 4. Lymph nodes

Contents : Strap muscles

= digasteric triangle Contents : Lymph nodes Submandibular salivary gland Facial artery

Contents : Lymph nodes + anterior Jugular vein

Triangles of the neck

Branches of external carotid artery .. + anateric artery ( superficial temporal artery + maxillary artery )

Common carotid artery Origin : arch of aorta or brachiocwphalic trunk

1a .. Submental 1b .. Submandibular 2 .. upper jugular (jugulodigasteric lymph nodes) 3 .. Middle jugular 4 .. Inferior jugular 5a&b .. Posterior triangle 6 .. Anterior triangle 7 .. Under clavicle

Digasteric muscle Origin : mandibular fossa Insertion : mastoid process Action : elevate hyoid bone during swallowing

Omohyoid muscle Origin : shoulder Insertion : hyoid bone Nerve supply : ansa cervicalis

Sternomastoid muscle Attachment : superior .. Mastoid process Inferior .. Sternum & clavicle Nerve supply : Spinal accessory nerve