Cranial Nerve I Axial 1 Normal Anatomy The olfactory nerve, or cranial nerve (CN) I, is the first of 12 cranial nerves and provides innervation for the sense of smell….

Hypopharynx, Larynx, and Infrahyoid Neck Axial 1 Diagnostic Consideration Axial 1 on the next page shows both a T2-weighted sequence (upper image) and a T1-weighted image (lower). Note that cerebrospinal…

Brain Axial 1 Normal Anatomy Named after the French anatomist Paulin Trolard (1842–1910) and also known as the superior anastomotic vein, the vein of Trolard is the largest cortical vein…

Paranasal Sinuses Axial 1 Normal Anatomy The paranasal sinuses are composed of the frontal sinuses, the ethmoid sinuses or ethmoid air cells, the maxillary sinuses or maxillary antra, and the…

Temporal Bone Axial 1 Normal Anatomy The temporal bone initially may seem a daunting area for magnetic resonance imaging because of the apparent structural complexity. To understand the temporal region…

Vertebral Column Cervical Vertebrae: C1 (Atlas) and C2 (Axis) Cervical Vertebrae: C3, C4, and C7 External Craniocervical Ligaments Related posts: Thalamus and Basal Ganglia Mandible and Muscles of Mastication Ventricles…

Orbits Axial 1 Orbits Axial 1 Orbits Axial 2 Orbits Axial 2 Orbits Axial 3 Normal Anatomy The lenses are normally biconvex in shape. If this configuration is replaced by…

Ventricles and CSF Cisterns Axial 1 Normal Anatomy The ventricular system is located deep within the brain and is filled with cerebrospinal fluid (CSF). The normal appearance of CSF on…

Mandible and Muscles of Mastication Axial 1 Normal Anatomy Four paired muscles—temporalis, masseter, medial pterygoid, and lateral pterygoid—are the primary muscles of mastication, responsible for adduction and lateral motion. In…

Skull: Anterior Aspect Skull: Lateral Aspect Base of Skull: External Aspect Base of Skull: Bones, Markings, and Orifices Nose and Paranasal Sinuses: Cross Section Related posts: Thalamus and Basal Ganglia…