Intrafractional Head Movement During Radiosurgery

Author(s):  
Keyword(s):  
1999 ◽  
Vol 58 (3) ◽  
pp. 170-179 ◽  
Author(s):  
Barbara S. Muller ◽  
Pierre Bovet

Twelve blindfolded subjects localized two different pure tones, randomly played by eight sound sources in the horizontal plane. Either subjects could get information supplied by their pinnae (external ear) and their head movements or not. We found that pinnae, as well as head movements, had a marked influence on auditory localization performance with this type of sound. Effects of pinnae and head movements seemed to be additive; the absence of one or the other factor provoked the same loss of localization accuracy and even much the same error pattern. Head movement analysis showed that subjects turn their face towards the emitting sound source, except for sources exactly in the front or exactly in the rear, which are identified by turning the head to both sides. The head movement amplitude increased smoothly as the sound source moved from the anterior to the posterior quadrant.


This project is regarding the Motion controlled wheelchair for disabled. We are going to control motorized wheelchair using a head band having motion sensor and Arduino as controller. Problem: “often disabled who cannot walk find themselves being burden for their families or caretakers just for moving around the house. Disabled who are paralysed below head, who may not have functioning arms cannot control joystick controlled electric wheelchair.” This project is to solve their problem using a motion sensor to control their wheelchair. We are aiming towards building a more affordable, unique, low maintenance and available for all kind of head-controlled wheel chair.


Author(s):  
Richard Compton

This chapter examines polysynthetic word formation in Inuit (Eskimo-Aleut), using the presence and variable ordering of a closed class of adverbs within verbal complexes as a diagnostic device to evaluate the adequacy of different accounts of word formation. It is argued that a head movement account of Mirror Principle orders within Inuit words undergenerates with respect to the observed variation in adverb ordering, particularly if a fixed hierarchy of adverbial functional projections is assumed, as in Cinque (1999). Instead, it is shown that an analysis that employs a right-headed structure, XP-sized phasal words, and Ernst’s (2002) semantically based framework of adverb licensing better captures the observed variation.


2021 ◽  
Author(s):  
Zhong Zhao ◽  
Zhipeng Zhu ◽  
Xiaobin Zhang ◽  
Haiming Tang ◽  
Jiayi Xing ◽  
...  

Retina ◽  
2012 ◽  
Vol 32 (7) ◽  
pp. 1324-1327 ◽  
Author(s):  
Colin A. Mccannel ◽  
Eric J. Olson ◽  
Mark J. Donaldson ◽  
Sophie J. Bakri ◽  
Jose S. Pulido ◽  
...  

Linguistics ◽  
2020 ◽  
Vol 58 (6) ◽  
pp. 1737-1773
Author(s):  
Kyumin Kim

AbstractThe goal of this paper is to address the syntax of certain oblique nominals in Blackfoot (Algonquian) that are introduced by a set of verbal prefixes called linkers. In the literature, an oblique nominal introduced by a verbal affix always shows certain properties of objects, e.g., agreement. This type of affix is analyzed as forming a complex verb with the main verb via head movement, and the oblique nominal is treated as an object of the complex verb. However, this paper demonstrates that oblique nominals introduced by linkers in Blackfoot do not show certain object properties even though the linker looks like it forms a complex verb. Building on the lack of object properties, linker phrases are proposed to be adjuncts. As proposed for adjuncts generally (e.g., Stephanov, Arthur. 2001. Late adjunction and minimalist phrase structure. Syntax 4(2). 94–125), this paper proposes a late merge analysis for linker phrases. Within an Agree-based model (Chomsky, Noam. 2000. Minimalist inquiries: The framework. In Roger Martin, David Michaels & Juan Uriagereka (eds.), Step by step: Essays on minimalist syntax in honor of Howard Lasnik, 89–155. Cambridge, MA: The MIT Press, 2001. Derivation by phase. In Michael Kenstowicz (ed.), Ken Hale: A life in language, 1–52. Cambridge: The MIT Press) where the derivation proceeds by phases (Chomsky 2008), a linker phrase, as an adjunct, lacks the relevant features to participate in the derivation via Agree, and thus it merges late at the end of a given phasal derivation such as vP. When spell out applies, the linker linearizes with a [V-v] complex in the base position, i.e., vP, giving its surface appearance as a verbal affix. Under this view, a linker does not lead to formation of a complex verb as it does not undergo head movement to the verb, unlike applicative affixes, consistent with the absence of object properties.


2014 ◽  
Vol 67 (4) ◽  
Author(s):  
Gertjan Postma

AbstractIn this paper I discuss three properties of Brazilian Pomeranian, a Germanic language spoken in Espirito Santo, Brazil by descendents who emigrated in the 19th century. These three aspects of the verbal system are: 1. The relation between complex complementizers, a two-infinitive system, and split infinitives, previously discussed in van Gelderen (1993, 1998) and Schallert (2012, 2013), 2. Verb Projection Raising (VPR), as discussed by Riemsdijk 2002, Haegeman 2007, Salzmann 2011, and Brandner & Salzmann 2012, and 3. Verb-Second positioning of verbal clusters, previously discussed in Vos (2005). I discuss novel Pomeranian data from the perspective of the literature on these three topics, which have been thus far studied largely separately from one another. An integrated discussion sheds light on the nature and the proper analysis of these three phenomena. I argue that these phenomena are caused by the “weaknesses” of T. The weakness of T can be resolved “downward” by copying features onto T under selection by a higher head (agree), or can be resolved “upward” under head movement of T.


2003 ◽  
Vol 89 (5) ◽  
pp. 2516-2527 ◽  
Author(s):  
Laurent Petit ◽  
Michael S. Beauchamp

We used event-related fMRI to measure brain activity while subjects performed saccadic eye, head, and gaze movements to visually presented targets. Two distinct patterns of response were observed. One set of areas was equally active during eye, head, and gaze movements and consisted of the superior and inferior subdivisions of the frontal eye fields, the supplementary eye field, the intraparietal sulcus, the precuneus, area MT in the lateral occipital sulcus and subcortically in basal ganglia, thalamus, and the superior colliculus. These areas have been previously observed in functional imaging studies of human eye movements, suggesting that a common set of brain areas subserves both oculomotor and head movement control in humans, consistent with data from single-unit recording and microstimulation studies in nonhuman primates that have described overlapping eye- and head-movement representations in oculomotor control areas. A second set of areas was active during head and gaze movements but not during eye movements. This set of areas included the posterior part of the planum temporale and the cortex at the temporoparietal junction, known as the parieto-insular vestibular cortex (PIVC). Activity in PIVC has been observed during imaging studies of invasive vestibular stimulation, and we confirm its role in processing the vestibular cues accompanying natural head movements. Our findings demonstrate that fMRI can be used to study the neural basis of head movements and show that areas that control eye movements also control head movements. In addition, we provide the first evidence for brain activity associated with vestibular input produced by natural head movements as opposed to invasive caloric or galvanic vestibular stimulation.


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