Bones

Greater Trochanter

Greater Trochanter The arrow is pointing to the greater trochanter of the femur. The greater trochanter is a large quadrilateral eminence which forms the site of origin and insertion for several muscles: Origins: vastus lateralis Insertions: gluteus medius, gluteus minimus, obturator internus, piriformis The greater trochanter has two surfaces: Lateral Medial At the base of the greater trochanter is a deep depression known as the trochanteric fossa. Posteriorly is the intertrochanteric crest. The trochanteric fossa serves as the point of insertion for four muscles: Obturator externus Obturator internus Superior gemellus Inferior gemellus The greater trochanter has four borders: Superior Inferior …

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Greater Trochanter

Suprascapular Notch

Suprascapular Notch The structure indicated is the suprascapular notch. The suprascapular notch is a notch in the superior border of the scapula, and lies medial to the base of the coracoid process. The superior transverse scapular ligament runs across the top of the notch, converting it into an opening, or foramen. Below this ligament, the suprascapular nerve passes through. Above this ligament, the transverse scapular vessels pass.

Suprascapular Notch

Anterior Cranial Fossa

Anterior Cranial Fossa The anterior cranial fossa is shaded in yellow. The cranial cavity is divided into three fossae: 1)      Anterior 2)      Middle 3)      Posterior The anterior cranial cavity is formed from the following bones: Frontal bone (orbital plate) Ethmoid bone (cribriform plate) Sphenoid bone (body and lesser wings) The anterior cranial cavity contains the frontal lobes of the brain. Structures in the anterior cranial cavity include: Frontal crest – site of attachment for falx cerebri Foramen caecum – emissary veins from nasal cavity to superior sagittal sinus Crista Galli – site of attachment for falx cerebri Cribriform plate of …

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Anterior Cranial Fossa

Manubrium of Sternum

Manubrium of Sternum The highlighted structure is the manubrium of the sternum. The sternum consists of three parts Manubrium of the sternum Body of sternum Xiphoid process The manubrium of the sternum is the superior part of the sternum. The manubrium has the following features: Jugular notch (suprasternal notch) – you can palpate this notch yourself if you feel in the midline between the proximal ends of your clavicles. Articular site for clavicle Facet for attachment of first costal cartilage Demifacet for articulation with second costal cartilage Where the manubrium meets the body of the sternum, is a joint called …

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Manubrium

Malleus

Malleus The ossicles of the ear are tiny little bones that are located in the middle ear. They are the smallest bone in the human body (the word itself actually means “little bone”) and their purpose is to transmit sound vibrations from the eardrum (tympanic membrane), to the complex inner ear structures, ultimately leading to the perception of sound. There are a series of three ossicles in the ear: malleus incus stapes. The malleus is attached to the tympanic membrane and articulates with the incus, which in turn articulates with the stapes. The stapes, attaches to the membrane of the …

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Malleus