Practical 6/7 Weigert Sections Flashcards by Niamh O Leary

Q

identify the weigert

A

lumbar cord
- fibre tracts are few
- large anterior and posterior horns due to lumbar plexus

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Q

1

A

fasciculus gracilis

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Q

2

A

posterior horn

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Q

3

A

anterior horn

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Q

identify weigert

A

thoracic cord
- Fibre tracts are larger
- Grey matter is scanty as no limb plexuses

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Q

1

A

fasciculus gracilis

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Q

2

A

fasciculus cuneatus
- dark tracts
- heavilty myelinated
- for fast conduction

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Q

3

A

posterior horn

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Q

4

A

anterior horn

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Q

5

A

lateral horn
- sympathetic neurons

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Q

indentify the weigert

A

cervical cord
- fibre tracts are larger
- grey matter is large
- brachial plexus
- no lateral horn

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Q

1

A

fasiculus gracilis

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Q

2

A

fasciculus cuneatus

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Q

3

A

posterior horn

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Q

4

A

anterior horn

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Q

identify weigert

A

lower/upper medulla

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Q

1

A

fasciculus gracilis terminating

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Q

2

A

nucleus gracilis

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Q

3

A

fasciculus cuneatus

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Q

4

A

nucleus cuneatus

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Q

5

A

internal arcuate fibres

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Q

6

A

medial lemniscus

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Q

7

A

spinal tract of V

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Q

8

A

spinal nucleus of V

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9

incerior olivary nucleus

10

pyramid

identify the weigert

upper medulla

1

fourth ventricle

2

hypoglossal nucleus

3

dorsal motor nucleus of CN X - vagus

4

vestibular nuclei

5

solitary tract (black)

6

medial lemniscus

7

inferior olivary nucleus (only seen on upper medulla)

8

olivocerebellar fibres crossing to the inferior cerebellar peduncle

9

inferior cerebellar peduncle

10

pyramid

identify weigert

pontomedullary junction - shaped like bear's head - upper medulla on top - part of basilar pons below

1

vestibulocochlear nerve (hanging off bear's ears)

identify weigert

mid-pons

1

massive basilar pons

2

corticopontine, corticonuclear and corticospinal fibres descending as circular bundles

3

transverse corticocerebellar fibres (in horizontal bundles

4

middle cerebellar peduncle

5

medial lemniscus (now in a horizontal position)

6

superior cerebellar peduncle

identify weigert

upper pons

1

basilar pons as before

2

medial lemniscus

3

superior cerebellar peduncle

4

CN IV emerging from midbrain at the top

identify weigert

pons midbrain junciton - midbrain on top and pons below

1

inferior colliculus

2

periaqeuductal grey

3

decussation of superior cerebellar peduncles

4

medial lemniscus

5

basilar pons as before

identify weigert

lower midbrain

1

inferior colliculus

2

periaqeuductal grey

3

IV nucleus

4

decussation of superior cerebellar peduncles

5

medial lemniscus

6

substantia nigra

7

cerebral peduncles

8

interpenducular fossa

identify weigert

upper midbrain

1

pineal gland overhanging (calcified)

2

superior colliculus

3

periaqueductal grey

4

red nucleus

5

substantia nigra

6

cerebral peduncles

7

interpenducular fossa

8

pituitary stalk

9

parts of the thalamus