Blowout fractures of the orbital floor involve disruption of the inferior orbital wall, often due to blunt trauma to the eye. CT imaging identifies the fracture, orbital content herniation, and potential muscle entrapment, which can cause diplopia or restricted eye View Diagram CT Scan of a Blowout Fracture of the Inferior Wall
The lingual tonsil is part of WaldeyerÂ’s ring at the base of the tongue, comprising lymphoid tissue that contributes to immune defense. It traps pathogens and participates in mucosal immunity. Knowledge of lingual tonsil anatomy is essential for ENT specialists, View Diagram The Lingual Tonsil Waldeyers Ring
The nerves of the dorsum of the foot provide sensory innervation to the skin of the dorsal surface. This anatomy diagram of the anatomy of the nerves of the dorsum of the foot highlights the superficial and deep fibular nerves. View Diagram Anatomy of the Nerves of the Dorsum of the Foot Superficial and Deep Fibular Nerves
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
The infrahyoid muscles of the neck, including sternohyoid, omohyoid, sternothyroid, and thyrohyoid, depress the hyoid and larynx during swallowing and speech. Lateral views reveal their attachments to the hyoid, sternum, and thyroid cartilage. Knowledge of infrahyoid anatomy is essential for View Diagram Lateral View of the Infrahyoid Muscles of the Neck
The lacrimal nerve, a branch of the ophthalmic division of the trigeminal nerve, provides sensory innervation to the lateral upper eyelid and conjunctiva. Knowledge of its course is essential for ophthalmologists, plastic surgeons, and medical students in eyelid surgery, trauma View Diagram Course of the Lacrimal Nerve
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
The cardiac conduction pathway ensures coordinated contraction of the heart. It begins at the sinoatrial node in the right atrium, which acts as the natural pacemaker. The impulse travels to the atrioventricular node, where it is briefly delayed. From there, View Diagram Overview of Conduction Pathway Components
Measuring the female pelvis involves assessing obstetric and diagonal conjugates to determine pelvic capacity for childbirth. The obstetric conjugate measures the narrowest anteroposterior diameter of the pelvic inlet, while the diagonal conjugate extends from the sacral promontory to the pubic View Diagram Measuring the Female Pelvis Obstetric and Diagonal Conjugates
The palmar cutaneous branch of the median nerve arises proximal to the carpal tunnel and supplies sensation to the central palm. Because it travels superficial to the flexor retinaculum, sensation over the palm is preserved in carpal tunnel syndrome.
The first layer of plantar muscles includes abductor hallucis, flexor digitorum brevis, and abductor digiti minimi. These muscles lie just beneath the plantar fascia and play a role in maintaining the arches of the foot. Abductor hallucis moves the big View Diagram First Layer of Plantar Muscles
The pancreas is divided into four main parts: the head, neck, body, and tail. The head lies within the C-shaped curve of the duodenum, making it closely related to the bile duct and an important area in pancreatic disease. The View Diagram Parts of the Pancreas
Embryological terminology such as ventral, dorsal, cranial, and caudal describes orientation and position in developing embryos, aiding in anatomical description and organ development studies. Knowledge of these terms is essential for embryologists, medical students, and clinicians interpreting developmental anatomy, malformations, View Diagram Embryological Terminology Ventral Dorsal Cranial Caudal
The posterior auricular vein drains blood from the scalp region behind the ear. It descends posterior to the auricle and joins with the posterior division of the retromandibular vein to form the external jugular vein. Along its course, it receives View Diagram Posterior Auricular Vein Course and Tributaries
Nerves within the posterior triangle of the neck include the accessory, cervical plexus, and branches of the brachial plexus, providing motor and sensory innervation to the neck and shoulder. Knowledge of these nerves is essential for surgeons, neurologists, and medical View Diagram Nerves within the Posterior Triangle of the Neck
The trachea bifurcates at the level of the sternal angle into the right and left main bronchi. The right bronchus is wider, shorter, and more vertical than the left, making it more prone to foreign body aspiration. Each main bronchus View Diagram The Right and Left Bronchi Bifurcation of the Trachea
The lateral compartment of the leg contains the fibularis longus and brevis muscles, responsible for eversion and plantarflexion of the foot. These muscles are innervated by the superficial fibular nerve and receive blood supply from branches of the fibular artery. View Diagram Lateral Compartment of the Leg
The hypothalamo-hypophysial portal system is a network of blood vessels connecting the hypothalamus to the anterior pituitary. It consists of primary capillaries in the median eminence, portal veins that descend to the anterior pituitary, and secondary capillaries delivering hypothalamic releasing View Diagram The Hypothalamo hypophysial Portal System
The cerebrum is divided into frontal, parietal, temporal, and occipital lobes. Each lobe has specialized functions such as motor control, sensation, hearing, vision, and higher cognition.
