Bridging Veins Of The Brain

Great Cerebral Vein Galen Tentorial

The superficial cerebral veins cortical veins carry blood from the outer 1-2 cm of the brain surface to large drainage channels such as the superior and inferior sagittal sinuses, the great cerebral vein of Galen, the straight sinus, and the tentorial veins. Thus, the cerebellar veins drain blood from the cerebellar surface into the superior vermian vein and thence into the great cerebral vein, straight sinus, and transverse sinuses. The deep cerebral veins central veins drain blood from the...

Drugs That Can Aggravate Myasthenia Gravis

Antibiotics tetracyclines, aminoglycosides, polymy-xins, gyrase inhibitors, penicillins Psychoactive drugs benzodiazepines, barbiturates, tricyclic antidepressants, chlorpromazine, haloperidol, droperidol, lithium Anticonvulsants phenytoin, ethosuximide, barbiturates Cardiovascular agents Quinidine, ajmaline, procainamide, lidocaine, ganglioplegics, nifedipine, -block- Promethazine, thioridazine. Chlordiazepoxide, ma-protiline, mianserin or carbamazepine can be used at low doses and with...

Are Allodynia And Multiple Sclerosis Related

Neuropathies

Disturbances of the peripheral nervous system may be subdivided into those affecting neuronal cell bodies neuronopathy and those affecting peripheral nerve processes peripheral neuropathy . Neuronopathies include anterior horn cell syndromes motor neuron lesions p. 50 and sensory neuron syndromes sensory neuronopathy, ganglionopathy pp.2, 107, 390 . Motor neuron diseases are described on p. 304. Peripheral neuropathy is characterized by damage to myelin sheaths myelinopathy and or axons...

Intracranial Hypertension

The normal intracranial pressure ICP is 60-120 mmH2O, which corresponds to 5-15 mmHg. An ICP greater than 30 mmHg impairs cerebral blood flow an ICP greater than 50 mmHg for more than 30 minutes is fatal an ICP greater than 80 mmHg for any length of time can cause brain damage. Intracranial hypertension may be either acute developing in hours to days or chronic lasting for weeks or months . Its manifestations are progressively more severe as the ICP rises, but are not specific thus, the...

Multiple Sclerosis Motor Tics

Tics are rapid, irregular, involuntary movements motor tics or utterances vocal tics that interrupt normal voluntary motor activity. They are triggered by stress, anxiety, and fatigue but may also occur at rest they can be suppressed by a voluntary effort, but tend to re-emerge with greater intensity once the effort is relaxed. Tics are often preceded by a feeling of inner tension. They may be transient or chronic. Simple tics. Simple motor tics involve isolated movements, e. g., blinking,...

Cribriform Plate Infection

Cribriform Plate Infection

CNS infection may involve the leptomeninges and CSF spaces meningitis , the ventricular system ventriculitis , the gray and white matter of the brain encephalitis , or the spinal cord myelitis . A focus of bacterial infection of the brain is called a brain abscess, or cerebritis in the early stage before a frank abscess is formed. Pus located between the dura mater and the arachnoid membrane is called a subdural empy-ema, while pus outside the dura is called an epidural abscess. The clinical...

Olfactory Disturbances Dysosmia

Cirrhosis And Cerebral Edema

76 Olfactory disturbances can be classified as either quantitative anosmia, hyposmia, hyper-osmia or qualitative parosmia, cacosmia . Con genital olfactory disturbances manifest themselves as partial anosmia olfactory blindness . The perceived intensity of a persistent odor decreases or disappears with time olfactory adaptation . External factors such as an arid environment, cold, or cigarette smoke impair the ability to smell diseases affecting the na-sopharyngeal cavity impair both smell and...