The middle cerebral artery (MCA) supplies lateral portions of the frontal, temporal, and parietal lobes. Infarcts in the MCA territory can cause contralateral hemiparesis, sensory deficits, aphasia, and visual field defects. Imaging and clinical correlation help localize the stroke and View Diagram Middle Cerebral Artery Infarct
The bony surfaces of the temporomandibular joint include the mandibular condyle and the temporal bones articular fossa, forming a hinge and sliding joint. These surfaces allow jaw movements such as opening, closing, and lateral motion. Knowledge of TMJ anatomy is View Diagram boney surfaces of the temporomandibular joint
Laparoscopic cholecystectomy is a minimally invasive procedure to remove the gallbladder, requiring knowledge of cystic duct and artery anatomy, Calots triangle, and surrounding structures. Understanding surgical anatomy is essential for surgeons and medical students to prevent bile duct injury, ensure View Diagram Laparoscopic Cholecystectomy
Hiatus hernias occur when part of the stomach protrudes through the esophageal hiatus of the diaphragm. They are classified into sliding, paraesophageal, and mixed types, each with different clinical implications. Sliding hernias involve the gastroesophageal junction moving upward, while paraesophageal View Diagram Classifications of Hiatus Hernias
CT scans of a ruptured spleen reveal hematoma, laceration, and free intra-abdominal fluid, aiding in trauma assessment and surgical planning. Knowledge of splenic anatomy and radiographic features is essential for trauma surgeons, radiologists, and medical students in diagnosing splenic injuries View Diagram CT Scan of a Ruptured Spleen
The infratemporal fossa contains multiple bony features including the lateral pterygoid plate, maxilla, and mandible. These surfaces support muscles of mastication, blood vessels, and nerves. Knowledge of the infratemporal fossa is essential for surgeons, dentists, and medical students in performing View Diagram Bony Features of the Infratemporal Fossa
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
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
Hydrocephalus appears on CT scans as dilation of the cerebral ventricles due to cerebrospinal fluid accumulation. It can be communicating, caused by impaired absorption, or non-communicating, caused by obstruction within the ventricular system. Symptoms include headache, nausea, vomiting, cognitive decline, View Diagram Hydrocephalus on a CT Scan
Aortic dissection is a life-threatening condition involving a tear in the aortic wall. This anatomy diagram shows separation of layers and formation of a false lumen. Understanding this pathology is essential in emergency cardiovascular care.
CT scans of cerebellar tonsil herniation show downward displacement through the foramen magnum, often associated with Chiari malformations. This can compress the brainstem, cerebellum, and cerebrospinal fluid pathways, causing headache, dizziness, motor or sensory deficits, and hydrocephalus. Imaging demonstrates the View Diagram CT Scan of Cerebellar Tonsil Herniation
Quinsy, also known as a peritonsillar abscess, is a collection of pus that forms in the tissue around the tonsil. It usually develops as a complication of untreated or severe tonsillitis. Patients often experience intense throat pain on one side, View Diagram Quinsy Inflammation of Peritonsillar Tissue
Pericardial tamponade occurs when fluid accumulates in the pericardial sac, compressing the heart and impairing cardiac output. Knowledge of pericardial anatomy is essential for cardiologists, emergency physicians, and medical students in diagnosis, echocardiography, and pericardiocentesis. Understanding tamponade pathophysiology ensures timely View Diagram Pericardial Tamponade
Testicular torsion occurs when the spermatic cord twists, cutting off blood supply to the testis. It typically presents with sudden, severe scrotal pain and swelling. The affected testis may lie higher than normal and be tender to touch. Because prolonged View Diagram Testicular Torsion
A severe L4L5 disc herniation occurs when the nucleus pulposus protrudes through the annulus fibrosus, compressing nearby nerve roots. At this level, the L5 nerve root is commonly affected. Patients may experience lower back pain radiating down the leg, often View Diagram Severe herniation of L4 L5 disc
Episiotomy is a surgical incision of the perineum during childbirth to enlarge the vaginal opening and prevent tearing. Knowledge of perineal anatomy is essential for obstetricians, midwives, and medical students in performing episiotomy, managing trauma, and postpartum repair. Understanding the View Diagram Episiotomy
Head rotation mainly occurs at the atlantoaxial joint between the first and second cervical vertebrae. The dens of the axis acts as a pivot, allowing the atlas and skull to rotate around it. Muscles such as sternocleidomastoid and splenius capitis View Diagram Head Rotation
Mastoiditis is an infection of the mastoid air cells located in the mastoid process of the temporal bone. These air-filled spaces communicate with the middle ear, so infections often arise secondary to otitis media. The condition can cause swelling, pain View Diagram Mastoiditis Infection of the Mastoid Air Cells of the Ear
Intraperitoneal organs, such as the stomach and small intestine, are completely enveloped by visceral peritoneum, whereas retroperitoneal organs, including the kidneys and pancreas, lie behind it. Understanding the distinction is critical for surgeons, radiologists, and medical students in planning surgical View Diagram Intraperitoneal and Retroperitoneal Organs
