The coupling of head,reach and grasp movement in nine months old infant prehension

In 9-month-old-infants adjustments in the reaching pattern to sudden changes in object location were examined. An attractive ball was presented to the infants at their midline and on some trials (perturbation trials) the ball suddenly changed position 15 cm to the right or left during the reach. For the perturbed trials the movement times approximately doubled compared to the control trials and significantly fewer balls were grasped. The results indicate that infants need to finish the first movement before being able to redirect the reach to a new destination. The correlation between the latency of the head and hand adjustment to the perturbation were 0.85 and 0.78 for movements to the left and to the right, respectively, indicating a tight coupling. The time between the start of the perturbation and peak velocity (TPPV) was significantly shorter for the head movement than for the hand movement, indicating that the head is leading the hand.     

THREE COMPARATIVE MAPS OF THE HUMAN

Abstract. This article is a response to the 1994 Star Island conference on the "Decade of the Brain" from a Jewish perspective. After a brief introduction about the logical function of models and maps, I compare and contrast three models of the human: Ezekiel's vision of the chariot in the Hebrew Scriptures, Franz Rosenzweig's geometry of the human face in Der Stern der Erlosung (the Star of Redemption), and a standard anatomical picture of the human brain. Whereas Rosenzweigs face is seen to be compatible with Ezekiel's chariot, both are seen to be radically distinct from the implicit conception of what a human being is in modern medical science. I conclude with a suggestion that the differences are to be understood in terms of their different intended functions and express my hope for some new kind of model that will incorporate the functional advantages of both.     

Long-term rod dark adaptation in man. Threshold measurements, rhodopsin regeneration and allosteric sensitivity regulation. An evaluation

Recent evidence strongly suggests that the relationship between threshold elevation ( T ) and fraction of bleached rhodopsin ( B ), obtained during a major, middle period of long-term rod dark adaptation in man, is well described by a power function, i. e., T = k · Bⁿ , where k is a multiplicative constant and n is the exponent. Due primarily to the low reliability of measurements of rhodopsin regeneration, however, the exponent n of the power function cannot, at present, be given an exact value. Available information indicates that the value of the exponent ranges between 2.4 and 4. Implications of this uncertainty are discussed within the framework of the allosteric, tetrameric model of rod dark adaptation. It is concluded that this model in its simplest form may only offer a first approximation of the real system implicated in the process.     

Defining Death for Persons and Human Organisms

This paper discusses how alternative concepts of personhood affect the definition of death. I argue that parties in the debate over the definition of death have employed different concepts of personhood, and thus have been talking past each other by proposing definitions of death for different kinds of things. In particular, I show how critics of the consciousness-related, neurological formation of death have relied on concepts of personhood that would be rejected by proponents of that formulation. These critics rest on treating persons as qualitative specifications of human organisms (Bernat, Culver, and Gert) or as identical to human organisms (Capron, Seifert, and Shewmon). Since advocates of the consciousness-related, neurological formulation of death are not committed to either of these views of personhood, these critics commit the fallacy of attacking a straw man. I then clarify the substantive concept of personhood (Boethius, Strawson, and Wiggins) that may be invoked in the consciousness-related, neurological formulation of death, and argue that, on this view and contra Bernat, Culver, and Gert, persons have always been the kind of thing that can literally die. I conclude by suggesting that the discussion of defining death needs to focus on which approach to personhood makes the most sense metaphysically and morally.     

CAN NEUROSCIENCE PROVIDE A COMPLETE ACCOUNT OF HUMAN NATURE?: A REPLY TO ROGER SPERRY

Abstract. In a recent Zygon article (June 1991), Roger Sperry argues for the unification of science and religion based on the principle of emergent causation within the central nervous system. After illustrating Sperry's position with some current experiments, I suggest that his conclusions exceed his argument and the findings of contemporary neuroscience and propose instead a pluralistic, rather than unified, approach to the relations between religion and science necessitated by the incompleteness inherent in any strictly neurological account of human nature.     

A CRITIQUE OF BOROWITZ'S POSTMODERN JEWISH THEOLOGY

Abstract. Borowitz's book is primarily a systematic response by a liberal Jewish theologian to his perceived challenges from rationalism on one hand and postmodernism on the other. It is within this context that Borowitz discusses issues of the relationship between modern science and Judaism. The first part of this essay is a summary of Borowitz's book. Here I locate Borowitz's place in the general discipline of Jewish philosophy and theology. The second part of the paper is a critique of Borowitz's discussion of postmodernism and liberalism. It is in this concluding section that the issues raised by contemporary science for Jewish religious thought are discussed.     

Pavlovian conditioning in human skilled motor behavior

The role of Pavlovian contingencies in human skilled motor behavior was investigated in three experiments by means of a new conditioning preparation. In Experiment 1 the present method was shown to be appropriate for the study of associative learning. Subjects who experienced a standard delay configuration performed significantly more conditioned responses than subjects who received either backward conditioning or random pairings. Stimulus generalization was shown to be slight in two additional groups. Subsequent experiments examined conditioning with multiple conditioned stimuli (CSs). In particular, in Experiment 2 some reciprocal overshadowing was demonstrated when two conditional stimuli (tone and vibration) were compounded. Experiment 3 investigated blocking. Blocking was less than expected, however. Subjects’ perceptions of the stimuli and reaction time data suggest that a certain proportion had shifted their attention to the added element of the CS compound. Results are discussed in relation to other studies on Pavlovian learning in humans and animals, which are concerned with “stimulus selection.”     

An analysis of “dignity”

The word dignity is frequently used both in clinical and philosophical discourse when referring to and describing the ideal conditions of the patient's treatment, particularly the dying patient. An exploration of the variety of meanings associated with the word dignity will note dignity's ambiguous usage and reveal instrumental concepts needed to better understand the discourse of the dying. When applied to a critique of recent and contemporary criticisms of the medical community's handling of the dying, such concepts might provide a more coherent notion of dignity. Rather than a separate construct, a death with dignity might be viewed as an interactive process among the dying and their caretakers. Together, this interdependent amalgam engages in humanizing communication aimed toward understanding the final needs and wants of the patient.     

A Primer on Celtic Spirituality With Recommendations for Counseling Practice

Research suggests that expressions of Celtic spirituality are widespread among the U.S. populace (e.g., Pew Research Center, 2014; Sullivan, 2016). Adherents vary in their commitment levels, ranging from informal cultural participants to followers of structured forms of the faith tradition (e.g., Celtic Christianity, Wicca, Paganism). The counseling literature provides scant information on this movement and germane approaches to support clients who identify with this spirituality. To respond to this deficiency, we address the topic by contextualizing Celtic spirituality from definitional, historical, and thematic perspectives. Next, we consider implications for spiritually sensitive counseling practice. We include a case study, exemplifying potential adaptive counseling processes and interventions.