ASIA scale 571 Diagram
Posted inMedical

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,…
Mastoid Fossa Overview Diagram
Posted inBones

Mastoid Fossa Overview Diagram

The mastoid fossa (antrum) is the largest mastoid air cell, opening into middle ear via aditus ad antrum, lined by mucosa continuous with tympanic cavity. It provides space for middle…
Zygomatic Nerve Course Branches Diagram
Posted inMedical

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.
Radial Nerve Palsy Wristdrop Diagram
Posted inDisease

Radial Nerve Palsy Wristdrop Diagram

Radial nerve palsy causes wrist drop (loss of extensors), sensory loss dorsum hand/thumb-index-middle. Common from humeral shaft fracture (spiral groove) or Saturday night compression.
Anatomical Course of the Musculocutaneous Nerve Diagram
Posted inMedical

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.
Peristaltic Contractions of the Stomach Diagram
Posted inOrgans

Peristaltic Contractions of the Stomach Diagram

Peristaltic contractions of the stomach involve coordinated circular muscle waves starting at the fundus/body, progressing toward the pylorus to mix and propel chyme. They’re regulated by enteric nervous system, vagus…
Third Layer of Plantar Muscles Diagram
Posted inMuscles

Third Layer of Plantar Muscles Diagram

Third layer of plantar muscles includes flexor hallucis brevis (to big toe), adductor hallucis (oblique/transverse heads to big toe), and flexor digiti minimi brevis (to little toe). They support toe…
Interspinales Muscle of the Back Diagram
Posted inMuscles

Interspinales Muscle of the Back Diagram

Interspinales muscles span between adjacent spinous processes (cervical/thoracic/lumbar), aid extension, stabilize vertebrae during posture/movement. Part of deep back muscles.
glomerulus Diagram
Posted inCell

Glomerulus Diagram

The glomerulus is a tuft of fenestrated capillaries inside Bowman’s capsule, forming the filtration unit of the nephron. It receives blood from the afferent arteriole, filters plasma (excluding large proteins/cells)…
Course of the Great Auricular Nerve Diagram
Posted inMedical

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…
C spine picture Diagram
Posted inBones

C spine picture Diagram

C-spine picture shows seven cervical vertebrae: C1 atlas (no body, anterior/posterior arches), C2 axis (dens/odontoid), C3-C6 typical (bifid spinous, transverse foramina), C7 prominent spinous (vertebra prominens).