Motor pathways — Flashcards

Flashcard 1: What syndrome is associated with a lesion of the following areas? 1. Corticospinal tract 2. Corticobulbar tract 3. Fibers of CN III

Answer: Medial midbrain (Weber) syndrome

Flashcard 2: The _____-cerebellar tract carries unconscious proprioceptive input from the upper extremities/trunk

Answer: cuneo

Flashcard 3: What syndrome is associated with a lesion of the following areas? 1. Corticospinal tract 2. Medial lemniscus 3. Abducens nerve (CN VI)

Answer: Medial pontine syndrome (Middle alternating hemiplegia)

Flashcard 4: What syndrome is associated with lesion of the following areas? 1. Spinothalamic tract 2. Spinal trigeminal nucleus 3. Hypothalamospinal tract 4. Nucleus ambiguus (CN IX, X) 5. Vestibular nucleus (CN VIII) 6. Inferior cerebellar peduncle

Answer: Lateral medullary (Wallenberg) syndrome

Flashcard 5: How many neurons are required for the lateral corticospinal tract pathway (voluntary muscle movement)? _____

Answer: Two (UMN & LMN)

Flashcard 6: What is an Argyll-Robertson pupil?

Answer: pupil that is unreactive to light but constricts with accomodation

Flashcard 7: Embryological origin of the neurohypophysis

Answer: Neuroectoderm (Diencephalon)

Extra: The neurohypophysis (posterior pituitary) develops from a downward extension of the neuroectoderm from the floor of the diencephalon (the infundibulum). In contrast, the adenohypophysis (anterior pituitary) develops from Rathke's pouch (oral ectoderm).

Flashcard 8: pineal gland

Answer: neuroectoderm

Flashcard 9: retina

Answer: neuroectoderm

Flashcard 10: optic nerve

Answer: neuroectoderm