Neuroanatomy — Flashcards

Flashcard 441: The auditory information from the medial geniculate body projects to the _____ of the superior temporal gyrus

Answer: primary auditory cortex

Flashcard 442: Lesion to which artery affects the nucleus ambiguus? _____

Answer: Posterior inferior cerebellar artery (PICA)

Flashcard 443: Which ascending spinal tract is responsible for the transmission of **pain** and **temperature** sensations?

Answer: Spinothalamic tract

Extra: The spinothalamic tract also carries **crude touch**. Key anatomical features: 1. **First-order neurons:** Cell bodies in dorsal root ganglia. 2. **Decussation:** Occurs in the spinal cord at the level of entry via the **anterior white commissure**. 3. **Termination:** VPL nucleus of the thalamus.

Flashcard 444: Which dopaminergic pathway connects the ventral tegmentum (midbrain) to the limbic system? _____

Answer: Mesolimbic pathway

Flashcard 445: Light reflex: Light in either retina sends a signal via CN II to the _____ nuclei

Answer: pretectal

Flashcard 446: The closer a destructive axon lesion is to the neuronal _____, the more likely the neuron is to die

Answer: cell body

Flashcard 447: Name the white matter tract located between the apex of the dorsal horn and the surface of the spinal cord that carries primary afferent fibers for pain and temperature.

Answer: Lissauer's tract (posterolateral tract)

Extra: Fibers in Lissauer's tract (primarily A-delta and C fibers) typically ascend or descend one or two spinal segments before synapsing in the substantia gelatinosa (Lamina II) of the dorsal horn.

Flashcard 448: Do dorsal rami of spinal nerves contain sensory or motor neurons? _____

Answer: Both

Flashcard 449: Identify the motor speech area located in the inferior frontal gyrus (Brodmann areas 44 and 45).

Answer: Broca's area

Flashcard 450: _____ aphasia is caused by damage to Broca's area, Wernicke's area, and the arcuate fasciculus

Answer: Global