The primitive reflexes and the postural reactions comprise one of the earliest, simplest, and most frequently used tools among child neurologists to assess the central nervous system integrity of infants and young children. Infants with cerebral palsy have been known to manifest persistence or delay in the disappearance of primitive reflexes and pathologic or absent postural reactions. The clin...

Recent studies indicate a modular organization of the nociceptive withdrawal reflex system. Each module has a characteristic receptive field, closely matching the withdrawal movement caused by its effector muscle. In the rat, the strength of the sensory input to each module is tuned during the first postnatal weeks, i.e., erroneous spinal connections are depressed, and adequate connections are ...

Case presentation: Female patient, 8 years old, born in Itanhaem, from São Paulo, with a previous context of hypotonic infant syndrome, repetitive head nodding movements, convergent strabismus, alopecia, low implantation the ears and short stature. On evaluation, he was alert, without language alterations, threshold for fructation, difficulty concentrating, hyperactivity, but evidence intellect...

INTRODUCTION Polyneuropathy is one of the most prevalent neurologic disorders. Although several studies explored the role of the neurological examination in polyneuropathy, they were mostly restricted to specific subgroups of patients and have not correlated examination findings with symptoms and electrophysiological results. OBJECTIVES To explore the sensitivity and specificity of different ...

A reflex is an involuntary physiological response evoked by external stimuli. Robert Whytt, though he believed in the spirit, identified neural pathways that elicit some actions, including pupillary light reflex. Bell and Magendie found ventral dorsal spinal roots responsible for separate motor sensory functions. Marshall Hall elucidated medullary control of complex behaviors. Charles Sherringt...

Abstract Background Auditory neuropathy spectrum disorder (ANSD) is characterized by normal OHCs function as shown intact cochlear microphonics (CMs) and/or otoacoustic emissions (OAEs); absent or grossly abnormal auditory brainstem responses (ABRs) and middle ear muscle reflexes. This study designed to address whether the input/output of distortion product OAEs (DPOAEs I/O) in ANSD patients si...

The involvement of inhibitory transmitters for Ptychodiscus brevis toxin (PbTx)-induced depression of spinal synaptic transmission in neonatal rats was investigated. Stimulation of a dorsal root evoked monosynaptic reflex (MSR) and polysynaptic reflex (PSR) potentials in the segmental ventral root. The PbTx depressed the reflexes in a concentration-dependent manner and this depression was block...

OBJECTIVE This case study is about an 11-year-old girl with bilateral facial weakness, abnormal taste sensation, and absent deep tendon reflexes of both knees and ankles. However, the muscle power of the lower and upper extremities across all muscle groups was normal. After 2 days, she developed paresthesia and numbness in the lower extremities. Other neurologic examinations, such as fundoscopi...