Cortex, white matter and brain networks in one 3D atlas, taught as relationships you explain, not pictures you recognise.
Fifteen association, projection and commissural bundles in direction colour, seen from the left, rendered in Blender from the reference atlas data. The cortex strips away to show them.
Red left to right
Green front to back
Blue up and down
The tractography direction code. Here it marks a family’s dominant direction; the atlas renders keep their own pigments.
Front to back
Mostly up and down
Front to back
Cortex, no fibre directionEach lesson runs on the live atlas. You locate the structures, put the neighbours in the same view, and answer a resident-level question before the explanation and its sources are revealed. Lessons run 8 to 22 minutes, depending on how many relationships each one covers.
The other seventeen
A highlighted parcel, a nearby tract and weakness appear in one report. What does each actually establish?
8 minA tract looks short and sparse. How do you describe the discrepancy without declaring it absent?
8 minAn expected anterior loop appears short in a reconstruction. What would you investigate first?
12 minA left insular lesion extends toward the lentiform complex despite preserved naming. Which observations are still needed?
12 minA person omits items on the left during search despite useful hand strength. How would you localize the question?
18 minSpeech is fluent but meaning-related substitutions occur, with repetition better preserved than comprehension. Which relationships matter?
22 minAfter a frontoinsular procedure, redirecting behaviour toward relevant events is difficult. What must a useful explanation include?
18 minA left deep lesion is followed by right face, arm and leg weakness with hemisensory loss but no visual-field symptom. Which capsular part leads?
16 minWhich callosal segment and neighbouring systems matter when a posterior disconnection hypothesis affects visual transfer but spares basic motor output?
16 minA resident must explain a semantic or phonological deficit near the anterior temporal lobe. Which pathway relationship should be examined first?
14 minIpsilateral facial weakness accompanies contralateral body weakness. Which cranial nerve level and long tract relationship come first?
16 minHow do the UF, IFOF, anterior commissure and optic radiation change their relationships along the limen and temporal stem?
16 minWhich parts of the insular floor can the atlas show, and which must remain anatomical context?
14 minHow do the fornix and cingulum enter the Papez model, and what does the atlas leave unresolved?
16 minHow would you connect medial frontal initiation with descending motor anatomy while keeping every body-map claim tied to its level and evidence?
16 minWhich task evidence is needed to assess executive control beyond motor and language observations?
15 minHow can a resident follow visual and association pathways while keeping an individual reading map separate from population anatomy?
15 min
Four fictional glioma teaching cases for senior residents. Read the vignette, commit to an anatomical account, then compare it with the debrief. Synthetic MRI-style plates, no patient data.
Open the Case ConferencePilot. Debriefs are awaiting independent clinical review.
A fictional deep frontal target and two illustrative access corridors, worked through on the reference atlas. Orient the anatomy, compare the corridors, then explain what changes between them.
Try the MIPS exercise
Drag a lesion sphere through group-average white matter and see which sampled bundles it cuts. For each bundle, the lab quotes what the author’s teaching notes say injury to it causes, with the sources, or says no quoted evidence.
Open the lesion labGroup reference, not this patient. Educational draft awaiting independent clinical review.
Hodos was built by Dr. Erion de Andrade, neurosurgeon in Porto Alegre with skull base and neuro-oncology fellowships at Cleveland Clinic and Emory University, and residency preceptor at Hospital São José, Santa Casa de Porto Alegre. Hodos is the Greek word for path, the root of hodotopy: function lives in the pathways as much as in the cortex.
Licences and limits are on the sources page.
About 20 minutes on the live atlas. Orient the central region, compare its banks, explain the deficit.
Start a lesson