ANATOMY OPEN BLOG

Popliteus muscle

ORIGIN: lateral condyle of femur and lateral meniscus. INSERTION: posterior surface of tibia, into the medial two-thirds of the triangular area above the soleal line. MNEMONIC: numbers popped (popliteus) from the little dial(lateral condyle) of the phone(femur) kept on the table(tibia). NERVE SUPPLY: tibial nerve ACTIONS: The popliteus muscle is involved in two main movements of …

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Sartorius muscle

The sartorius is the muscle of the anterior compartment of the thigh and is the longest muscle in the body. ORIGIN: anterior superior iliac spine(ASIS) INSERTION: upper part of medial surface of tibia. MNEMONIC: A SIS sits on the table(tibia). NERVE SUPPLY: Femoral nerve. ACTIONS: Abductor, lateral rotator of thigh and flexor of leg. The …

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Middle Ear

Introduction Also called the Tympanic cavity/ Tympanum. It is an air-filled, mucous membrane lined space in the Petrous Temporal bone, between the internal and external ear. Subdivided into- 1-Tympanic cavity proper-opposite the tympanic membrane 2-Epitympanic recess-above the level of tympanic membrane Shape Like a cube compressed from side to side, with large lateral and medial …

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Fascial layers of the neck and carotid sheath

The Fascial layers of the neck (cervical fascia) can be divided into two parts: Superficial cervical fascia Deep cervical fascia SUPERFICIAL CERVICAL FASCIA This later is the superficial (outer) layer is between Dermis and Deep cervical fascia.Structures in the superficial fascia are: Platysma muscle Superficial veins (example- external jugular vein) Cutaneous neurovascular supply Superficial lymph …

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Right Atrium

CONTENTS Position of right atrium External features Internal features POSITION It is the upper right chamber of heart. It forms the right border, upper border, the sternocostal surface & base of heart. EXTERNAL FEATURES The chamber is elongated vertically. Receives superior vena cava at upper end & inferior vena cava at lower end. Upper end …

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Left Coronary artery

ORIGIN Left posterior aortic sinus of ascending aorta. COURSE Posterior aortic sinus Forward                                                                                       Pulmonary trunk       Left       Left auricle   BRANCHES ANTERIOR INTERVENTRICULAR BRANCH ⇒ Septal branches ⇒ Left conus artery forms arterial ring around pulmonary trunk with right conus  artery ⇒ Ant ventricular branches…largest is “left diagonal artery”        2. CIRCUMFLEX BRANCH ⇒ Atrial branches ⇒ Left marginal …

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Arch of Aorta

The ascending aorta extends itself as the arch of aorta at sternal angle and it further extends itself as descending thoracic aorta at sternal angle. So, the beginning and the ending is at the level of sternal angle. It is situated in the superior mediastinum behind the lower half of manubrium sterni. COURSE Begins as …

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