How to draw different sections

of the brain stem

Sanjaya AdikariDepartment of Anatomy

Anterior surface

Posterior surface

Main nerve tracts in the spinal cord

A B

G

C

DEF

A. Posterior white columns

B. Lateral corticospinal tract

C. Anterior & posterior spinocerebellar tracts

D. Anterior & posterior spinothalamic tracts

E. Olivospinal, vestibulospinal, tectospinal tracts

F. Anterior corticospinal tract

G. Rubrospinal tract

Closed medulla at the level of decussation of pyramids

Fasciculus gracilis

Fasciculus cuneatus

Nucleus gracilis

Nucleus cuneatus

Spinal tract of trigeminal nerve

Spinal nucleus of trigeminal nerve

Decussation of pyramids

Pyramid

Posterior spinocerebellar tract

Anterior spinocerebellar tract

Spinothalamic tract

Spinal root of the accessory nerve

Central canal

Medial longitudinal fasciculus

Closed medulla at the level of decussation of medial lemnisci

Fasciculus gracilis

Fasciculus cuneatus

Nucleus gracilis

Nucleus cuneatus

Spinal tract of trigeminal nerve

Spinal nucleus of trigeminal nerve

Decussation of medial lemnisci

Pyramid

Posterior spinocerebellar tract

Anterior spinocerebellar tract

Spinothalamic tract

Hypoglossal nerve

Spinal root of the accessory nerve

Central canal

Medial longitudinal fasciculus

Medulla Oblongata at the level of middle of the olivary nucleiInferior medullary velum

Cavity of 4th ventricle

Inferior cerebellar peduncle

Vestibular & cochlear nuclei

Olivary nucleus

Olive

Pyramid

Anterior spinocerebellar tract

Spinothalamic tract

Spinal tract & nucleus of trigeminal nerve

Vagus nerve

Hypoglossal nerve

Reticular formation

Medial longitudinal fasciculus

Tectospinal tract

Medial lemniscus

Pons at the level of facial colliculus

Superior medullary velumCavity of 4th ventricle

Inferior cerebellar peduncle

Spinal lemniscus

Reticular formation

Medial lemniscus

Superior cerebellar peduncle

Spinal tract & nucleus of trigeminal nerve

Medial longitudinal fasciculus

Facial colliculus

Abducent nerve

Facial nerve

Pontine nuclei

Transverse pontine fibres

Corticospinal & corticonuclear fibres

Vestibular nuclei

Midbrain at the level of inferior colliculus

Trochlear nerve

Inferior colliculus

Cerebral aqueduct

Medial longitudinal fasciculus

Mesencephalic nucleus of trigeminal nerve

Trigeminal lemniscus

Spinal lemniscus

Medial lemniscus

Substantia nigra

Cerebral peduncle

Decussation of superior cerebellar pedunclesInterpeduncular fossa

Reticular formation

Periaqueductal Gray Matter

Midbrain at the level of superior colliculus

Oculomotor nerve

Superior colliculus

Cerebral aqueduct

Medial longitudinal fasciculus

Mesencephalic nucleus of trigeminal nerve

Trigeminal lemniscus

Spinal lemniscus

Medial lemniscus

Substantia nigra

Cerebral peduncle

Red nucleus

Reticular formation

Periaqueductal Gray Matter

PPRF = Paramedian pontine reticular formation

Medial longitudinal fasciculus