Netter's Neuroscience Flash Cards (2nd Edition) Review

A comprehensive set of question and answer flashcards covering neuronal structure, spinal cord anatomy, brain stem systems, and clinical neurobiology based on Netter's Neuroscience Flash Cards.

What is the primary metabolic demand of neurons for maintaining ion gradients across the cell membrane?

Direct delivery of oxygen and glucose for aerobic metabolism, as neurons possess very little metabolic reserve.

Where is the primary anatomical substrate for the blood-brain barrier (BBB) located?

In the tight junctions of the capillary endothelial cells.

Which specific glial cells are responsible for the myelination of axons within the central nervous system (CNS)?

Oligodendrocytes.

What is the characteristic ratio of glial cells to neurons in the human brain?

Approximately 10 times more glial cells exist than neurons.

What are the three clinical signs of Horner's syndrome resulting from damage to the sympathetic supply to the head?

Ipsilateral ptosis (drooping eyelid), miosis (pupillary constriction), and anhidrosis (loss of sweating on the face).

What is the typical sodium equilibrium potential toward which a neuronal membrane moves during explosive depolarization?

Approximately $+55\,mV$.

Which brain structure is essential for the consolidation of short-term memory into long-term traces?

The hippocampal formation.

What is the result of a skull fracture that tears the middle meningeal artery?

An arterial bleed into the potential space between the outer layer of the dura and the skull, known as an epidural hematoma.

Which thalamic nucleus serves as the primary relay for visual processing?

The lateral geniculate body (nucleus).

Which thalamic nucleus is responsible for auditory processing?

The medial geniculate body (nucleus).

What is the function of Broca's area, and where is it located in the dominant hemisphere?

It is responsible for expressive language function and is located in the left inferior frontal gyrus.

Which structure connects the two cerebral hemispheres to allow for the transfer of stimuli and activities between them?

The corpus callosum.

What developmental condition results from the failure of the rostral neuropore to close?

Anencephaly, which involves a failure of brain development and exposure of neural rudiments.

Which specific nerve is responsible for the motor innervation of the diaphragm?

The phrenic nerve, formed from the $C3$ to $C5$ ventral roots.

What is the primary function of the cerebellum?

To smooth and coordinate motor movements and coordinate neural activities for nonmotor functions.

Which neurotransmitter is utilized by all preganglionic autonomic neurons and all lower motor neurons of the spinal cord?

Acetylcholine (ACh).

What is the function of the suprachiasmatic nucleus of the hypothalamus?

It receives visual inputs to regulate circadian rhythms and diurnal cycles.

Which spinal cord tracts are responsible for conveying fine, discriminative touch and joint position sense?

The dorsal columns, consisting of the fasciculus gracilis and fasciculus cuneatus.

What condition involves a bilateral loss of pain and temperature sensation due to a syrinx in the central canal of the spinal cord?

Syringomyelia.

Which cranial nerve provides the efferent limb for the pupillary light reflex?

The oculomotor nerve (CN III).

What is the clinical manifestation of a lesion to the ulnar nerve at the hand?

Wasting of hand muscles and a "claw hand" deformity characterized by hyperreflexia at metacarpophalangeal joints and flexion at interphalangeal joints.

What is the primary role of the enteric nervous system's myenteric (Auerbach's) plexus?

The regulation of peristaltic responses and automated secretory activity within the gastrointestinal tract.

Which brainstem structure coordinates horizontal eye movements by acting as the horizontal gaze center?

The parapontine reticular formation (PPRF).

What is the function of the Edinger-Westphal nucleus?

It provides parasympathetic preganglionic fibers to the ciliary ganglion for pupillary constriction and lens accommodation.

Which artery provides the blood supply to the visual cortex on the banks of the calcarine fissure?

The calcarine branch of the posterior cerebral artery (PCA).