Anatomy: Neuroanatomy

Explore the neuroanatomy of the nervous system, including central and peripheral divisions, neurons and glial cells, brain structures, spinal cord, cranial nerves, sensory pathways, and cerebrospinal fluid dynamics.

Examine the vertebral column anatomy, including vertebral counts (cervical to coccyx), intervertebral discs and foramina with nerve exits, and the protection of the spinal cord along with key curvatures.

Describe the ocular motor and abducens nerves, the trigeminal divisions, and the vagus and accessory nerves, including visual, auditory, and olfactory pathways, and their functional components and clinical implications.

Explain the facial nerve's five functional components, its nuclei and the nerve's course from brainstem to parotid gland, plus its major branches and key injury-level implications.

Learn about the glossopharyngeal nerve anatomy, its nuclei and functional components, course and branches, and applied aspects such as parotid secretion, posterior tongue sensation, and carotid body input.

Explain the hypoglossal nerve, the 12th cranial nerve supplying all tongue muscles (extrinsic and intrinsic except palatoglossus), its nuclei, and its course via the hypoglossal canal and ansa cervicalis loop.

Detail the visual pathway from retina to primary visual area, including retina structure, rods and cones, macula, optic nerve, chiasm, tract, radiation, Meyer's loop, and accommodation and light reflex.

Explore auditory pathway from spiral ganglion to the primary auditory cortex, noting its four-order organization and bilateral connections. Trace the path from spiral ganglion through cochlear nuclei to area 41/42.

Identify the two-neuron olfactory pathway from olfactory receptors to mitral and tufted cells, then to the primary olfactory cortex near the anterior perforated substance and parahippocampal area 28.

Describe the transverse section of the medulla at the pyramidal decussation, label central gray matter into nuclei, and identify pyramidal decussation, reticular formation, and corticospinal tracts.

Explore the medulla at the sensory decussation level, detailing the gracilis and cuneatus nuclei, their separation from central gray matter, and the internal arcuate fibers forming the medial lemniscus.

Explore the medulla at the level of the olives, detailing the inferior olivary nucleus, pyramids, and the vagus and vestibular nuclei, with implications for motor coordination and sensory pathways.

Explore lateral medullary syndrome from posterior inferior cerebellar artery injury and medial medullary syndrome from paramedian medulla involvement, with ipsilateral facial sensory loss and contralateral body deficits.

Examine the lower pons, detailing basilar and tegmental divisions, and map cochlear and vestibular nuclei, trapezoid body, and facial nerve relations via the middle cerebral peduncle.

Step through the upper pons with a transverse section, outlining its internal anatomy, including the ventricle region, trapezoid body, middle cerebellar peduncle, and nearby nuclei along a lateral-to-medial course.

Explain applied pons anatomy using diagrams of basilar pontine vascular occlusion and Riemann, Millard Guilbeault, and Willi syndromes, detailing facial nucleus, abducens, and corticospinal fiber involvement.

Explore the subdivisions of the midbrain, including the tegmentum, substantia nigra, and peduncles, with a transverse section showing the aqueduct of Sylvius and the interpret angular facade.

Create a labeled diagram of the midbrain at the level of inferior calculus, outlining the crux cerebri. Mark the pyramidal tract and corticospinal fibers, with medial and lateral divisions.

Examine the midbrain section at the level of the superior colliculi, identifying the red nucleus, ocular motor nucleus, and key tegmental features.

Explore the midbrain via a schematic transverse section, highlighting Weber, Benedict, and Parinaud syndromes, their vascular bases, and structures such as the oculomotor nerve, medial lemniscus, and red nucleus.

Describe the cerebellum’s anatomy: location, lobes and vermis, nodules and nuclei, white matter arbor vitae, and major connections via peduncles, with clinical signs like ataxia and nystagmus.