anatomy and physiology of the heart valves

Báo cáo khoa học: Structure, linkage mapping and expression of the heart-type fatty acid-binding protein gene (fabp3 ) from zebraﬁsh (Danio rerio) pot

... major band of  650 bp and the minor band of  570 bp were excised, cloned and sequenced. M: 100 bp DNA ladder (with molecular sizes shown on the left of the panel). Lane 1: 3Â RACE product of FABP3 ... migrated off the end of the gel during electrophoresis. As both the HaeIII and MboI- digested DNA samples generated two fragments in the Southern blot hybridization, and neither site is present in the cDNA ... RT-PCR, the mRNA must be of such low abundance in most of these tissues, with the exception of primary oocytes and liver, that it is below the sensitivity of detection by the technique of Fig....

Ngày tải lên: 31/03/2014, 07:20

12 506 0

ANATOMY, PHYSIOLOGY, AND DISORDERS OF THE AUDITORY SYSTEM - PART 1 pps

... disorders. The book provides the basis for a broad understanding of the anatomy and function of the ear and the auditory nervous system, and it discusses the cause and treatment of hearing disorders. ... focus either on the anatomy and function of the ear, the auditory nervous system or on peripheral or central hearing disorders. This book covers both anatomy and physiology of the ear and the nervous ... system. The book also provides a comprehensive coverage of disorders of the auditory system emphasizing the interaction between patholo- gies of the middle ear and the cochlea and the function of the...

Ngày tải lên: 11/08/2014, 06:21

33 399 1

ANATOMY, PHYSIOLOGY, AND DISORDERS OF THE AUDITORY SYSTEM - PART 2 ppsx

... between the effective area of the tympanic membrane and the area of the stapes footplate, but the lever ratio of the middle ear bones also contributes. The ratio of areas of the 24 Section I The ... entrance of the ear canal depends on the frequency of the sound and on the angle of incidence of the sound (direction to the sound source). 6. The difference in time of arrival of a sound at the ... towards. Other studies of the stimulation of the inner hair cells have shown further evidence that the motion of the stereocilia is more complex than that of the basilar membrane and that the deflection...

Ngày tải lên: 11/08/2014, 06:21

33 375 0

ANATOMY, PHYSIOLOGY, AND DISORDERS OF THE AUDITORY SYSTEM - PART 4 potx

... understanding of the anatomy and physiology of the auditory nervous system of clinical importance. Most studies of the function of the auditory system have aimed at the coding of different kinds of ... receive their input from the ICC and the ICX. The posterior division of the MGB (PO) receives input from the ICC and projects to the AAF cortical area. The neurons in the ventral portion of the ... the difference in the arrival time and the difference in the intensity of sounds at the two ears, both factors being a function of the azimuth. 21. The time between the arrival of sounds at the...

Ngày tải lên: 11/08/2014, 06:21

33 739 0

ANATOMY, PHYSIOLOGY, AND DISORDERS OF THE AUDITORY SYSTEM - PART 6 pot

... between the middle of that line and the vertex. The origin of the vectors is the latency of the first peak in the dipole and the length is the relative strength of the dipoles. Note the short ... portion of the floor of the lateral recess is the (dorsal) surface of the dorsal cochlear nucleus and the rostral portion of the floor of the lateral recess is the dorsal surface of the ventral ... the auditory nerve and the ventral cochlear nucleus are the first part of the reflex arc of both the contralateral and the ipsilateral pathways of the acoustic stapedius reflex (Fig. 8.2). The...

Ngày tải lên: 11/08/2014, 06:21

33 394 0

ANATOMY, PHYSIOLOGY, AND DISORDERS OF THE AUDITORY SYSTEM - PART 7 pot

... tones [182]. The latency of the ipsilateral and the contralateral responses are similar. The latency of the change in the acoustic impedance is the sum of the neural conduction time and the time ... subjects and standard error of the mean are shown as a function of the intensity of the noise. The TTS was measured 20 s after the end of the exposure. In this study the noise exposure consisted of ... reducing the intensity of a sound (turning the volume of a loud- speaker down). Many forms of disorders of the conduc- tive apparatus will resolve on their own, as they often do in the case of otitis...

Ngày tải lên: 11/08/2014, 06:21

33 464 0

ANATOMY, PHYSIOLOGY, AND DISORDERS OF THE AUDITORY SYSTEM - PART 8 docx

... role of outer hair cells, that is to increase the sensitivity and frequency selectivity of the ear (cf. Chapter 3). The widening of the tuning of the basilar membrane broadens the “slices” of the ... contraction of the stapedius muscle normally causes the stapes to move perpendicular to the surface of the flat portion of the incudo-stapedial joint and that does not cause any movement of the incus and ... fine details of the anatomy of the stapes and its suspension in the oval window, the incudo-stapedial joint and the ori- entation of its plane surface. This causes considerable individual variation in the...

Ngày tải lên: 11/08/2014, 06:21

33 381 0

ANATOMY, PHYSIOLOGY, AND DISORDERS OF THE AUDITORY SYSTEM - PART 9 pdf

... corresponding to the F1 frequency and the other corresponding to the frequency of F2. The rate of the impulses is that of F0 for voiced sounds, and a quasi-random rate (average of 100 pps) for ... simplest version, the processing of the signals from the microphone consists of separating the sound spectrum into 4–8 frequency bands and then applying the output of these filters to the respective ... range of sound intensities [58]. The number of channels that are required depends on the resolution of coding of the intensity of sounds in these frequency bands [184]. If the resolution of the coding...

Ngày tải lên: 11/08/2014, 06:21

33 460 0