Effects of monaural sound stimulation on subjective visual vertical.

Background: Sound stimulation can influence electrophysiological vestibular reflexes. However, the effects of sound stimulation on space perception remain unknown.

Objective: To know the effects of monaural sound stimulation on subjective visual vertical (SVV).

[A case of primary central nervous system lymphoma with marked cauda equina enlargement].

An 80-year-old woman presented with subacute right lower limb pain and bilateral lower limb weakness. MRI of the spine showed marked cauda equina enlargement with contrast enhancement. Cerebrospinal fluid (CSF) examination showed elevated cell count, decreased glucose, and elevated protein.

Ocular flutter as the presenting manifestation of autoimmune glial fibrillary acidic protein astrocytopathy.

A 39-year-old man exhibited ocular flutter and cerebellar ataxia following a subacute disturbance of consciousness and partial seizure. He was diagnosed with autoimmune glial fibrillary acidic protein (GFAP) astrocytopathy by tissue- and cell-based antibody assays. Brain single-photon emission computed tomography detected a significant increase in blood flow in the fastigial nucleus, a critical region for eye saccade control.

Optimum divergence angle of a Gaussian beam wave in the presence of random jitter in free-space laser communication systems.

The average bit error rate (BER) of optical communication systems is considered in the presence of random angular jitter. First, the received power and the BER in the absence of jitter are reviewed. Then the average BER is obtained in the presence of circularly symmetric, normally distributed jitter by using the probability density function of the optical signal.