The ventricular system consists of the lateral ventricles, third ventricle, cerebral aqueduct, and fourth ventricle. These cavities contain cerebrospinal fluid, which cushions and nourishes the brain. Surface landmarks help approximate their location for clinical procedures.
The development of the nose and face begins in early embryogenesis with the formation of nasal placodes, frontonasal prominence, and maxillary and mandibular prominences. These structures fuse to create the external nose, nasal cavity, and facial contours. Abnormal fusion can View Diagram Development of the Nose and Face
Radial nerve palsy occurs when the radial nerve, which innervates the extensor muscles of the forearm and wrist, is injured. The classic clinical sign is wristdrop, where the patient cannot actively extend the wrist and fingers at the metacarpophalangeal joints. View Diagram Radial Nerve Palsy Wristdrop
The suprascapular nerve arises from the upper trunk of the brachial plexus and supplies the supraspinatus and infraspinatus muscles. Knowledge of its course is essential for orthopedic surgeons, neurologists, and medical students in diagnosing entrapment syndromes, managing shoulder injuries, or View Diagram Suprascapular Nerve
The rotatores muscles are small intrinsic back muscles that belong to the transversospinalis group. They extend from the transverse process of one vertebra to the lamina of the vertebra above. Although small, they play a role in stabilizing the spine View Diagram Rotatores Muscle of the Back
The adductor pollicis is a deep muscle in the hand, consisting of oblique and transverse heads. It functions primarily to adduct the thumb, bringing it toward the palm, and plays a vital role in precision grip and pinch strength. The View Diagram Deep Muscle of the Hand Adductor Pollicis
Radiographs of scoliosis reveal abnormal lateral curvature of the spine with vertebral rotation, commonly in thoracic or thoracolumbar regions. Severity is measured using the Cobb angle, guiding treatment decisions. Knowledge of scoliosis radiographic features is essential for orthopedic surgeons, radiologists, View Diagram Radiograph of Scoliosis of the Spine
The dorsal branch of the ulnar nerve provides sensory innervation to the dorsoulnar aspect of the hand and motor supply to intrinsic hand muscles. Knowledge of its course is essential for surgeons, neurologists, and medical students in managing trauma, nerve View Diagram Dorsal Branch of the Ulnar Nerve
Calcaneal fractures are visible on radiographs as disruption of the heel bone, often associated with axial loading injuries. Knowledge of fracture patterns is essential for orthopedic surgeons, radiologists, and medical students in managing conservative or surgical treatment. Understanding calcaneal anatomy View Diagram Radiograph of a Calcaneal Fracture
The internal oblique muscle is an important layer of the abdominal wall, located deep to the external oblique and superficial to the transversus abdominis. This anatomy diagram of the internal oblique highlights its origin from the iliac crest, inguinal ligament, View Diagram Abdominal Muscles Internal Oblique
Inversion and eversion are side-to-side movements of the foot that occur mainly at the subtalar joint. This anatomy diagram of ankle inversion and eversion demonstrates how inversion turns the sole inward, while eversion turns it outward. It highlights the role View Diagram Ankle Inv Ev
The surface anatomy of the femoral triangle shows its boundaries: inguinal ligament, sartorius, and adductor longus, containing the femoral nerve, artery, and vein. Knowledge of this region is essential for surgeons, radiologists, and medical students performing vascular access, catheterization, or View Diagram Surface Anatomy of the Femoral Triangle
The thoracoacromial artery is a short but important branch of the second part of the axillary artery. It arises deep to the pectoralis minor muscle and quickly pierces the clavipectoral fascia. Almost immediately, it divides into four main branches: pectoral, View Diagram Course of the Thoracoacromial Artery
The gallbladder is a pear-shaped organ that stores and concentrates bile produced by the liver. This anatomy diagram of the anatomical position of the gallbladder illustrates its location on the inferior surface of the liver in the right upper quadrant View Diagram Anatomical Position of the Gallbladder
The facial skeleton is composed of multiple bones including the maxilla, mandible, zygomatic, nasal, and lacrimal bones, providing structure and support for the face. These bones contribute to chewing, breathing, vision, and expression. Knowledge of facial bone anatomy is crucial View Diagram Bones of the Facial Skeleton
Peristaltic contractions of the stomach involve coordinated smooth muscle activity that mixes and propels chyme toward the pylorus. The muscular layerslongitudinal, circular, and obliquefacilitate these rhythmic movements. Neural and hormonal control, including the enteric nervous system and gastrin, regulates peristalsis. View Diagram Peristaltic Contractions of the Stomach
The sagittal section of the female pelvis reveals the anatomical relations of the internal reproductive tract, including the uterus, cervix, vagina, bladder, and rectum. The uterus lies anterior to the rectum and posterior to the bladder, with the broad ligaments View Diagram Sagittal Section of the Female Pelvis Anatomical Relations of the Internal Reproductive Tract
Gastric acid secretion is a vital physiological process that supports digestion and protects against ingested pathogens. This anatomy diagram of acid secretion illustrates the structure of the gastric glands and highlights the role of parietal cells in producing hydrochloric acid. View Diagram Acid Secretion
Untreated carpal tunnel syndrome (CTS) is characterized by prolonged compression of the median nerve within the carpal tunnel, causing numbness, tingling, and weakness in the hand and fingers. Over time, untreated CTS can lead to thenar muscle atrophy, reduced grip View Diagram Untreated CTS
The right atrium and interatrial septum form the hearts venous receiving chamber, collecting deoxygenated blood from the superior and inferior vena cava and coronary sinus. The interatrial septum separates the right atrium from the left atrium, featuring the fossa ovalis View Diagram Right Atrium and Interatrial Septum
