Regional Blood Supply to the Cerebrum Diagram
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Regional Blood Supply to the Cerebrum Diagram

Regional blood supply to the cerebrum divides into anterior (anterior cerebral to medial surface), middle (middle cerebral to lateral surface, insula, basal ganglia), and posterior (posterior cerebral to occipital, inferior…
The Submandibular Ganglion and Branches Diagram
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The Submandibular Ganglion and Branches Diagram

The submandibular ganglion hangs from lingual nerve, receives preganglionic parasympathetics from chorda tympani (facial), postganglionic fibers supply submandibular/sublingual glands for salivation. Sensory fibers pass through without synapse.
ASIA scale 571 Diagram
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ASIA scale 57 Diagram

ASIA scale assesses spinal cord injury impairment: A complete (no sensory/motor below level), B sensory incomplete, C motor incomplete with >50% key muscles
Neurulation
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Neurulation

Neurulation forms the neural tube precursor to CNS as notochord induces overlying ectoderm to thicken into plate, then elevate neural folds that fuse dorsally starting mid-region progressing cranially and caudally,…
Zygomatic Nerve Course Branches Diagram
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Zygomatic Nerve Course Branches Diagram

The zygomatic nerve (V2 branch) enters orbit via inferior orbital fissure, gives zygomaticotemporal (skin over temple) and zygomaticofacial (cheek) branches, and communicates with lacrimal nerve for parasympathetics.
Anatomical Course of the Musculocutaneous Nerve Diagram
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Anatomical Course of the Musculocutaneous Nerve Diagram

The musculocutaneous nerve (C5-C7, lateral cord) pierces coracobrachialis, runs between biceps/brachialis, supplies coracobrachialis, biceps, brachialis (elbow flexion/supination), then becomes lateral cutaneous nerve of forearm for lateral forearm skin.
Venous Drainage of the Pelvis Diagram
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Venous Drainage of the Pelvis Diagram

Pelvic venous drainage includes internal iliac veins (gluteal, obturator, vesical, uterine/vaginal, rectal plexuses), external iliac (femoral continuation), common iliac to IVC. Valveless plexuses allow retrograde spread in malignancy.
Course of the Great Auricular Nerve Diagram
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Course of the Great Auricular Nerve Diagram

The great auricular nerve (C2-C3 from cervical plexus) ascends behind sternocleidomastoid, emerges at Erb’s point, and supplies skin over parotid, mastoid, auricle, and angle of mandible. It’s commonly blocked for…
Infratrochlear Nerve Course Supply Diagram
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Infratrochlear Nerve Course Supply Diagram

The infratrochlear nerve (terminal branch of nasociliary, V1) exits orbit below trochlea, supplies sensation to medial upper eyelid, caruncle, lacrimal sac, root of nose, and skin between eye and nose…
Labelled Diagram of the Carotid and Prevertebral sheaths Diagram
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Labelled Carotid and Prevertebral sheaths Diagram

Labelled carotid sheath contains common/internal carotid artery, internal jugular vein, vagus nerve (CN X), sympathetic chain (cervical ganglia), deep cervical lymph nodes. Prevertebral fascia encloses prevertebral muscles (longus colli/capitis), brachial…
Embryo Week 3
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Embryo Week 3

Embryo week 3 is a pivotal period of gastrulation where the primitive streak appears on the epiblast, cells ingress to form mesoderm and definitive endoderm, displacing hypoblast, while the notochord…
DeglutitionN
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DeglutitionN

Deglutition, more commonly known as swallowing, is a remarkably coordinated process that moves food or liquid from the mouth to the stomach in three distinct phases while protecting the airway…
Urine Color Chart
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Urine Color Chart

Urine color normally pale straw yellow from urochrome pigment concentration, clear dilute dark concentrated dehydration, colorless overhydration diabetes insipidus, cloudy infection, pink red blood beets berries hematuria, orange medications bile…
Fetal Circulation
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Fetal Circulation

Before birth, the fetus relies on unique circulatory shortcuts because its lungs are non-functional and it gets oxygen and nutrients from the placenta via the umbilical cord. Oxygen-rich blood enters…