Boundaries Contents Mnemonic: Remember 6 ‘C’ 1. Frontal Crest: Site of attachment of falx cerebri 2. Foramen Cecum (Between frontal crest and crista galli): Site of communication between the draining veins of nasal cavity and the superior sagittal sinus 3. Crista galli: Site of attachment for falx cerebri 4. Cribiform…
Tag: Nervous system
PGMEE, MRCS, USMLE, MBBS, MD/MS 
Interpretation of NCCT head: Normal findings
History: In 1972, Sir Godfrey Hounsfield developed CT scan for which he was awarded Nobel prize in 1979. Through these years CT has come from one rotation in 6 minutes to one in 0.33 seconds. Principle: X rays are produced by CT machine, which are absorbed by different tissues in…
PGMEE, MRCS, USMLE, MBBS, MD/MS 
Medial and Lateral Plantar Nerves
Origin: Tibial nerve (both medial and lateral plantar nerve) Similar to: Course and innervation: Medial plantar nerve Lateral plantar nerve Origin Larger branch of tibial nerve Smaller branch of tibial nerve Course Deep to abductor hallucis muscleBetween 1st and 2nd plantar layers Deep to abductor hallucis muscleBetween 1st and 2nd…
PGMEE, MRCS, USMLE, MBBS, MD/MS 
Parasympathetic ganglia of Head and Neck
Important points: Mnemonics: 1. COPS 3977 2. C is 3rd letter hence related to cranial nerve III 3. S for Sphenopalatine and Submandibular and S for Seven and is related to Superior Salivatory nucleus 4. All postganglionic fibers are carried by trigeminal nerve (Cranial nerve V) Ganglion Nucleus Pre-ganglionic Post-ganglionic…
Clinical Skills and Approaches 
Glasgow Coma Scale
Best eye opening Mnemonic: ESPN Best verbal response Mnemonic: ASWGN Best motor response Mnemonic: OLD BEN Important points Question and Example A 20 year old man is hit over the head with a mallet. On arrival in the accident and emergency department he opens his eyes to pain and groans…
PGMEE, MRCS, USMLE, MBBS, MD/MS 
Spinal segments vs Vertebral level
Spinal segment: The part of spinal cord to which a pair of spinal nerves (right and left) is attached. Cause of mismatch between spinal segments and vertebral level: General rule: Vertebral level Add Spinal segment Cervical + 0 Same C7-T1 C8 T1-T3 +1 T1-T4 T3-T6 +2 T5-T8 T7-T8 +3 T9-T11…
PGMEE, MRCS, USMLE, MBBS, MD/MS 
Median, Ulnar and Radial Nerve – Course and Innervation
Median nerve, Ulnar nerve and Radial nerve are the 3 major nerves of the upper limb originating from the brachial plexus. Some important neuroanatomic relationships in the forearm are: 1. Medial nerve: Crossed by brachial artery from lateral to medial just above the elbow to lie medial to brachial artery…
PGMEE, MRCS, USMLE, MBBS, MD/MS 
Superior Orbital Fissure (SOF): Mnemonics
Superior Orbital Fissure (SOF) is a cleft between greater and lesser wing of sphenoid which connects orbit and middle cranial fossa. It is divided into 3 compartments by the tendinous ring (annulus of Zinn). Superior orbital fissure alone (Lateral compartment): Mnemonic: LFTS Superior orbital fissure in tendinous ring (Intermediate compartment):…