Anatomy A thin, fibrous sheet connecting between the medial border of the radius to the lateral border of the ulna. The collagen fibres pass obliquely downwards from the radius to the ulna. It has a free upper margin inferior to the radial tuberosity and a small hole in its distal third. These holes allow passageway

Anatomy Course The main veins draining the perineum. They travel superiorly to join the internal iliac veins. Drain Drain the perineum. Interested in taking our award-winning Pocket Anatomy app for a test drive?

Anatomy Course Branches off the anterior trunk of internal iliac artery where it then leaves the pelvis via the greater sciatic foramen below the piriformis muscle. It then enters the perineum via the lesser sciatic foramen. Supply Main supplier of the perineum, specifically the erectile tissues such as the penis and clitoris. Interested in taking

Anatomy Origin: Thoracolumbar fascia, iliac crest and the lateral two thirds of inguinal ligament. Insertion: Inferior border of 9th /10th to 12th ribs, aponeurosis to linea alba, pubic crest and pectineal line. Key relations: -Deep to the external obliques. -Muscle fibres run superomedially. Functions -Compresses abdominal cavity and raises intrabdominal pressure e.g raking leaves. -Flexes

Anatomy Course Starts when the inferior petrosal sinus and sigmoid sinus come together. It leaves the cranium via the jugular foramen and descends lateral to the internal and common carotid arteries. On both sides, it joins the subclavian veins to form the brachiocephalic veins. Drain Drains blood from the brain, neck and superficial face. Clinical

Motion These are uniaxial synovial hinge joints. They involve the articulations between the proximal and middle phalanges, and the articulations between the middle and distal phalanges. The movements possible at these joints are flexion and extension, greater at the proximal joints than at the distal. Stability Each joint has its own fibrous capsule. Stabilizing ligaments

Motion The interphalangeal joints are synovial hinge joints. They involve the articulations between the proximal, middle and distal phalanges of the toes. They allow mainly flexion and extension. Stability The fibrous capsules surrounding the joints plays a role in their stability. The joints are reinforced by the following ligaments: -Medial collateral ligament -Lateral collateral ligament

Anatomy Origin: Lateral edge of costal groove of the rib above. Insertion: Superior surface of the rib below. Key relations: -Muscle fibres run in the opposite direction to the external intercostals i.e. run obliquely posteroinferiorly. -Insert deep to the insertion of the external intercostals. Functions -Moves ribs inferiorly during expiration, thereby contracting the thoracic cavity.

Anatomy Course Starts at the greater sciatic foramen where it ascends behind and medial to the internal iliac artery until it reaches the prim of the pelvis. At this stage it joins with the external iliac vein, where it becomes the common iliac vein. Drain Drains the peritoneal area as well as the part of

Anatomy Tarsal bone, wedge-shaped, smallest of the cuneiforms, between lateral and medial cuneiforms, articulates forward with 2nd metatarsal, with cuneiforms either side, back with navicular. Vignette Ankle (talocrural) joint; tibia and fibula with tarsal. Subtalar joint; talar with calcaneus. Transverse Talar joint; talonavicular and calcaneocuboid. Tarsometatarsal joints (arthrodial/sliding); 3 cuneiforms and cuboid with metatarsals. Interested