Bones

Proximal Phalanx

Proximal Phalanx The structure indicated is the proximal phalanx of the 5th finger. The hand consists of three groups of bones: Carpals Metacarpals Phalanges The phalanges (phalanx = singular), form the fingers/digits of the hands. The thumb consists of two phalanges: proximal phalanx and distal phalanx. The rest of the fingers consist of: Proximal phalanx Middle phalanx Distal phalanx The phalanges themselves have the following features: Base (proximally) Head (distally) Shaft/body (in between the base and the head) Learn more about the anatomy of the bones of the hand in this tutorial.

proximal phalanx of 5th finger

Adductor Tubercle

Adductor Tubercle The structure indicated is the adductor tubercle of the distal femur. The adductor tubercle is found distally on the femur and is formed from the termination of the medial supracondylar line. The adductor tubercle serves as the point of attachment for the adductor magnus muscle. Learn more about the anatomy of the femur in this tutorial.

adductor tubercle

Acetabulum

Acetabulum The structure indicated is the acetabulum of the pelvis. The acetabulum is formed from the point joining the three bones of the pelvis (ilium, ischium and pubis), and is the site of articulation with the head of the femur. The femoroacetabular articulation is known as the hip joint. The acetabulum consists of two parts: Articular part Non-articular part The non-articular part consists of the acetabular fossa and the acetabular notch inferiorly. The ligamentum teres attaches at one end to the acetabular notch, and at the other end to the fovea capitis of the femur. The articular part forms a …

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Acetabulum

Greater Tubercle of Humerus

Greater Tubercle of Humerus The structure indicated is the greater tubercle of the humerus. The greater tubercle lies lateral to the head of the humerus as serves as the point of attachment for three of the rotator cuff muscles. There are three flat facets to which these three muscles attach: Superior facet Middle facet Inferior facet The supraspinatus attaches to the superior facet. The infraspinatus attaches to the middle facet. The teres minor attaches to the inferior facet. Separating the greater tubercle from the lesser tubercle is the intertubercular sulcus, also known as the bicipital groove. The long head of …

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Greater Tubercle of Humerus

Trapezium Bone

Trapezium Bone The structure indicated is the trapezium bone of the hand. There are three groups of bones in the hand: Carpal bones (8 in total) Metacarpal bones Phalanges The carpal bones are separated into two rows: Proximal row Distal row The trapezium bone is located in the distal row of carpal bones. There are four bones in the distal row: Trapezium Trapezoid Capitate Hamate The trapezium bone articulates with the 1st metacarpal of the thumb. It’s easy to confuse the location of the trapezium with the adjacent and similarly named trapezoid bone. A way to remember where the trapezium …

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Trapezium

Styloid Process of Ulna

Styloid Process of Ulna The structure indicated is the styloid process of the ulna. The styloid process of the ulna is a bony process that extends from the distal end of the ulna bone. Attaching to the styloid process of the ulna is the ulnar collateral ligament of the wrist. Learn more about the anatomy of the radius and ulna in this tutorial

Styloid process of ulna

Intertubercular sulcus

Intertubercular Sulcus The structure indicated is the intertubercular sulcus of the humerus. The intertubercular sulcus, also known as the intertubercular groove, or bicipital groove, is a groove separating the greater and lesser tubercles of the humerus. The tendon of the long head of the biceps muscle runs in this groove and attaches on the supraglenoid tubercle of the scapula. The short head of the biceps muscle on the other hand has its origin on the coracoid process of the scapula. The intertubercular sulcus is the site of three important muscle attachments: Pectoralis major Latissmus dorsi Teres major The pectoralis major …

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intertubercular sulcus

Posterior Inferior Iliac Spine

Posterior Inferior Iliac Spine The structure indicated is the posterior inferior iliac spine of the pelvic bone. The pelvic bone consists of three parts: Ilium Ischium Pubis The posterior part of the ilium consists of two bony spines. Superiorly is the posterior superior iliac spine, and inferiorly is the posterior inferior iliac spine. Anteriorly is the anterior superior iliac spine and the anterior inferior iliac spine. Learn more about the anatomy of the pelvic bones in this tutorial.

Posterior inferior iliac spine

Anterior Inferior Iliac Spine

Anterior Inferior Iliac Spine The structure indicated is the anterior inferior iliac spine of the pelvic bone. The pelvic bones consist of three parts: Ilium Ischium Pubis The anterior part of the ilium consists of two bony spines. Superiorly is the anterior superior iliac spine (ASIS), and inferiorly is the anterior inferior iliac spine. Posteriorly is the posterior superior iliac spine and the posterior inferior iliac spine. The rectus femoris muscle of the quadriceps group of thigh muscles attaches to the anterior inferior iliac spine, as well as the iliofemoral ligament. Learn more about the anatomy of the pelvic bones …

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pelvis - anterior inferior iliac spine

Hamate Bone

Hamate Bone The structure indicated is the hamate bone of the hand. There are three groups of bones in the hand: Carpal bones (8 in total) Metacarpal bones Phalanges The carpal bones are separated into two rows: Proximal row Distal row The hamate bone is one of four bones in the distal row of carpals (hamate, capitate, trapezium, trapezoid). It is named after its small hook-like process (“hamulus” comes from the Latin meaning hook). Several structures attach to the hook of the hamate bone. The hamate bone has the following articulations: Radial: capitate Ulnar: pisiform Proximal: lunate Distal: metacarpals of …

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hand - hamate