Network asymmetry of motor areas revealed by resting-state functional magnetic resonance imaging.

There are ample functional magnetic resonance imaging (fMRI) studies on functional brain asymmetries, and the asymmetry of cerebral network in the resting state may be crucial to brain function organization. In this paper, a unified schema of voxel-wise functional connectivity and asymmetry analysis was presented and the network asymmetry of motor areas was studied. Twelve healthy male subjects with mean age 29.

Enhancement of axonal regeneration of retinal ganglion cells in adult rats by etomidate: involvement of protein kinase C.

Purpose: To investigate the effect of etomidate (ET) on axonal regeneration of retinal ganglion cells (RGCs) in adult rats.

Methods: The optic nerve was transected intraorbitally at 1 mm from the optic disc, and an autologous peripheral nerve was transplanted onto the ocular ON stump in adult rats. Then the animals were treated with ET, Gö6976, ET combined with Gö6976, phorbol-12-myristate-13-acetate (PMA), or ET combined with PMA.

[Effect of renal artery embolization using 2-poly-hydroxyethyl-methacrylate as a liquid embolic agent: a study in rabbits].

Objective: To assess the effect of a liquid embolic agent 2-poly-hydroxyethyl -methacrylate (2-P-HEMA) for renal artery embolization in rabbits.

Methods: The precipitation time of different concentrations (2%, 3.5%, 5%, 6.

[Anatomy of the sphenoidal sinus in transsphenoidal approach through a single nostril].

Objective: To study the anatomy of the sphenoid sinus for safe pituitary adenoma resection via transsphenoidal approach through a single nostril.

Methods: Eight fresh adult cadavers and the magnetic resonance images (MRI) of the sphenoidal sinus of 5 adults were observed. In anteroposterior axes, the root of the nasal columella was defined as the point O, the inferior border of the sphenoidal sinus anterior wall as point B, the superior border of the spheniodal sinus anterior wall as point C, and the midpoint of the sellar floor as point D.

[Neuronavigation-assisted microanatomical study of the facial nerve canal through the transpetrosal approach].

Objective: To study the value of neuronavigation in the transpetroal approach, and to provide anatomic data for the protection of the nerves in the facial nerve canal (FNC) during surgeries.

Methods: Simulated surgery through the transpetroal approach was performed on 16 sides of 8 adult cadaver heads with the assistance by neuronavigation. The anatomy of the facial nerve and the relationship of related structures were observed and the distances from the utmost external edge of the mastoid to different segments of the FNC were measured.

Early diagnosis of cerebral infarction with near-infrared spectroscopy: an experimental study.

Objective: To monitor the changes in the blood flow and blood-oxygen content in rat cerebral tissue with focal cerebral infarction using near-infrared spectroscopy (NIRS), so as to verify the value of NIRS in early diagnosis of cerebral infarction.

Methods: Focal cerebral infarction models were established in 16 rats by injecting silk threads into the internal carotid artery. The bilateral blood flow and blood-oxygen content were monitored with NIRS in the models and also in 16 normal rats receiving saline injection to serve as blank control group.

Microanatomical and neuroendoscopic studies of the internal auditory meatus and its surrounding structures.

Objective: To observe the morphology of the internal auditory meatus in relation with its surrounding structures in Chinese people, for the purpose of providing microanatomical reference for surgeries adopting retro-sigmoid approach.

Methods: The retro-sigmoid surgical approach was simulated on 5 fresh specimens of human head, in which the internal auditory meatus and its surrounding structures were observed through a neuroendoscope and a surgical microscope. The distances from the posterior inferior edge of the internal auditory meatus to the central point of the posterior edge of the sigmoid sinus and to the posterior edge of the posterior semicircular canal were measured.