Ica 2024 Latest Questions With Graded A+ Solutions

1st part of subclavian artery - Vertebral, Internal thoracic, Thyrocervical - 4 branches (Inferior thyroid, Suprascapular, Transverse cervical (cervicodorsal), Ascending cervical) 4 portions of ICA - cervical, petrous, cavernous, cerebral Anterior cerebral (Branch of Ophthalmic) - A smaller of the 2 terminal branches, communicates with contralateral via anterior communicating Anterior Communicating clinical considerations - Permits flow from one ICA to contralateral ICA Arteries of scalp - Supratrochlear, Supraorbital (ICA - Branches of ophthalmic) Superior temporal, Posterior auricular, Occipital - (ECA) Branches of ICA Cerebral - Ophthalmic artery, Choroidal, Posterior communicating, Middle cerebral, Anterior Cerebral Branches of Petrous Portion ICA - Carticotympanic, artery of pterygoid canal Carotid sinus function - regulates systemic blood pressure 0 sensitive to oxygen and carbon dioxide Carotid Sinus location - origin of ICA at C3 - C4 Carotid Triangle border - (Anterioinferiorly) - superior belly of omohyoid (Anteriorsuperiorly) - posterior belly of digastric and stylohyoid (Posterior) - SCMCavernous and Intercavernous sinuses - Large venous spaces on each side of the pituitary gland - connected to each other via anterior and posterior --- Sinuses Circulus arteriosus/Circle of Willis - Circular anastamosis between ICA and Vertebral/Basilar system situated at the base of the brain in interpeduncular fossa surrounding optic chiasm, pituitary - Consists of anterior cerebral (anterior communicating), Cerebral ICA, Posterior communicating, Posterior cerebral Confluence of sinus drainage - Transverse sinus, sigmoid sinus, jugular bulb, IJV diploic veins - Occupy chanels w/ in diploe of cranial bones - communicate with meningeal vv, pericranial vv, sinuses of dura