Show Menu

Lobes of the brain + intracranial disorders Cheat Sheet by

Lobes of the brain + intracranial disorders

Lobes of the brain

Types of Intrac­ranial disorders

Cere­bro­vas­cular damage
Blood disorders
Arteri­ovenous Malfor­mations
Intr­acr­anial Tumours
Intr­acr­anial infect­ion
Post trauma


Supr­ate­ntorial Tumours
Infr­ate­ntorial Tumours
Raised ICP + brain shift S&S
Raised ICP + brain shift S&S
Tentorial herniation then tonsillar herniation
S&S of CSF outflow blockage
Causes tonsilliar herniation
VI Nerve Palsy - BS pushed downwards, stretches VI nerve over petrous tip Unre­liable sign
Extr­adural haemat­oma:
Pushes on hemisphere sideways under Falx, downwards through tentorium
Stretches CN III over edge of the tentorium - unilateral III nerve palsy reliable sign

Frontal Lobe

Func­tional areas:
Olfactory Bulb, tract + optic nerve
Frontal Poles
Cingulate Gyrus
Frontal eye fields
Corticol control of mictur­ition (urina­tion)
Corpus Callosum
Motor cortexes
Rolandic fissure (fissure between occupital + frontal lobe)
Sylvian Fissue (fissure between temporal + frontal lobe)
Broca's area

Frontal lobe Lesions:

Loss of drive
Decreasing concern about personal appear­ance, hygiene, family affairs, business
Memory problems
Diminished intellect
Focal, motor
Adversive (includes eyes)
Status Epilep­ticus (seizure lasting 10 minutes or more)
Possible Temporal lobe attacks due to its close proximity
Frontal lobe - person­ality, acquired social behaviour

More Symptoms

Weakness on opposite side of face and/body
If parasa­gittal, legs are affected bilate­rally
Loss of mictur­ition (urge incont­inence)
Speech Distur­bance - Dysphagia (Broca's)
Visual Distur­bance - in visual and or acuity
Alteration in smell


Intell­ectual impairment
Memory Defect
+ve Grasp Reflex
Contra­lateral UMNL signs
Unilateral anosmia
Visual pathway deficits
Dysphasic signs

Occipital Lobe Functional areas

Visual Associ­ation areas
Main Visual cortex
Calcarine fissure (medially in right hemisp­here)

Occipital Lobe Lesions

Seizures with flashing light Aura
Visual Field Defects
Visual Agnosia (cannot recognise visual inform­ation)

Parietal lobe Lesions (EITHER)

Sensory Seizures
Soft Motor signs
Visual pathway Distur­bance
Postural Sensation disturbed
Decreased Passive Joint Movement Sense
Touch Locali­sation Disturbed
2 pt Discri­min­ation disturbed
Apprec­iation of size + texture Disturbed
Perceptual Rivalry
Altered Optokinetc nystagmus
Perc­eptual Rivalry: When presented with two images, instead of them being superi­mposed, the images appear separately
Opto­kinetic nystag­mus: Following an object when stationary (larger visual field, occulo­motor response and directs image onto the retina, compared to small moving visual objects, directs image onto fovea in smooth pursuit)

Parietal Lobe Lesions (RIGHT & LEFT)

Anosog­nosia - no longer aware of opposite side
Confusion of right and left limb
Dyspraxia - loss of acquired skills
Finger agnosia
Distur­bance of Geographic Memory
Wernickes dysphagia
Werk­nicke's dyspha­gia- loss of produc­tio­n/c­omp­reh­ension of spoken &/or written language (acquired)

Temporal Lobe functional areas:

Unicinate fasciculus (connects uncus to orbital frontal cortex)
Inferior longit­udinal fasciculus (to visual associ­ation areas)
Motor fibres entering cerebral peduncles

Temporal Lobe Lesions

Epileptic - complex partial seizures "­on/­off­"
Complex Autono­misms :
Repeated fiddling with clothing
Walkin­g/d­riving then "­waking up"
Visual­/au­dit­ory­/sm­ell­s/taste halluc­ina­tions
Unpleasant visceral sensations
"­Som­ething awful is about to happen­"
Deja vu
Jamais vu
Deja vu:- described as a strong sensation that a current event has happen­ed/­occ­urred before
Jamais vu: - opposite to deja vu. Something that has happened in a person's life but they have the feeling it happened for the first time.


great cheat sheet. quick question: do you know how to delete/erase/remove DRAFT cheat sheets. i.e. sheet that I dont want to publish and want to remove them from my DRAFT sheets.

Thank you!

Add a Comment

Your Comment

Please enter your name.

    Please enter your email address

      Please enter your Comment.

          Related Cheat Sheets

          Serious HA Cheat Sheet

          More Cheat Sheets by Siffi

          Facial Pain Cheat Sheet
          Causes of Facial Pain Cheat Sheet
          Otology Cheat Sheet