We conclude that there is no simple relationship between information and utility. Even in the absence of information processing costs or bandwidth constraints, behavioral optimality does not imply information efficiency, nor is there a simple tradeoff between the two objectives of gaining information about a food source versus obtaining the food itself. For a wide AZD1208 in vivo range of values of the food source’s movement parameter, the strategy of collecting the most information possible about the unknown source location carries an ineliminable
structural cost, leading to a situation in which a foraging creature could actually choose to be less well-informed while simultaneously being, on average, better fed. (c) 2012 Elsevier Ltd. All rights reserved.”
“Objective.
-Three patients presented with painful paraesthesias in the dorsomedial aspect of the hand after removal of a ganglion cyst of the dorsal lower third of the forearm. This hand territory is usually innervated FRAX597 by the dorsal cutaneous branch of the ulnar nerve (DCU) but here it was innervated by a branch of the radial superficial nerve (RS). Consequently, we aimed to examine the frequency of this variant in the general population.
Methods. -Both RS and DCU were stimulated in the forearm and sensory response recorded from the dorsomedial skin area of the hand in the three patients and 100 normal controls.
Results. buy Temsirolimus -In all three patients, the RS nerve innervated the dorsomedial hand bilaterally. Nineteen out of 100 controls demonstrated variants of dorsomedial skin innervation of the hand on nerve conduction studies: 12 unilaterally and seven bilaterally.
Among them, 13 individuals had mixed innervation by both RS and DCU and six by the RS nerve only.
Conclusion. -Nerve conduction studies of both RS and DCU with sensory response recording on the dorsomedial hand area should be considered before surgical procedures on the dorsal lower forearm in order to prevent iatrogenic postoperative sensory nerves lesions. (C) 2013 Elsevier Masson SAS. All rights reserved.”
“Reduced central serotonergic activity and low total serum cholesterol have been related to increased aggression, violent behavior, and suicidality. Searching for a correlation between them, we estimated serum total cholesterol and CSF levels of the main serotonin metabolite 5-HIAA in medication free male and female subjects for whom diagnostic lumbar puncture was performed. To eliminate age influence, we included in the study subjects in the age range 26 to 45 years. In a group of 62 subjects (30 males), found negative after diagnostic neurological examination, the correlation was not significant for the whole group, but after sex stratification, a significant positive correlation was revealed for males but not for females.