Ears and Pinna

Yoshitomi, K.; Cole, Phaedra I.

doi:10.1016/b978-0-12-391448-4.00015-0

Cited by 2 publications

(2 citation statements)

References 28 publications

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“…The present case does demonstrate the importance of this technique and the necessity of use of serial sections. The present case is a rare histological type of an extraskeletal osteosarcoma with independent and different histological elements in rats, although auricular OSs in rats have already been reported in a textbook 13 .…”

mentioning

confidence: 57%

An extraskeletal osteosarcoma in the auricle of a Wistar Hannover rat

Shiga¹,

Katoh²,

Ito³

et al. 2019

J Toxicol Pathol

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An extraskeletal osteosarcoma was detected in the auricle of a 110-week-old female Wistar Hannover rat. Grossly, the tumor, measuring 15 mm in size, was observed in the subcutis as a solid and hard mass. Histologically, the majority of the mass comprised mature, compact bone. It was surrounded by neoplastic cells showing a variety of histologies, such as sarcoma, not otherwise specified, and myxosarcoma away from the bone-forming region. However, these different histological regions were considered to be components of a single bone tumor, based on the common expression of osterix and a similar mixture of constituent cells in each region. The tumor was diagnosed as an extraskeletal osteosarcoma because of the presence of infiltrative growth and abnormal mitosis and its development in the auricle without attachment to the skeleton. The present case is a rare histological type of an extraskeletal osteosarcoma with independent and different histological elements in rats.

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mentioning

confidence: 57%

An extraskeletal osteosarcoma in the auricle of a Wistar Hannover rat

Shiga¹,

Katoh²,

Ito³

et al. 2019

J Toxicol Pathol

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“…The main reason for this difference is due to the small head size of the rodents which generally have good high frequency hearing than rodents with larger head size (Old et al, 2020). Meanwhile, the external ear, or pinna, too can amplify or attenuate sound, thereby limiting the spectrum of excellent hearing (Yoshitomi & Cole, 2018). This is because the behavioural test was conducted with a loudspeaker located in front of subjects that causes the subjects with moveable pinnae to position their pinnae ideally for sensing sound (Miller-Klein, 2020).…”

Section: Audible Hearing Rangesmentioning

confidence: 99%

Hearing Range Analysis of Rattus Argentiventer the Paddy Field Pest

Abd Rahim,

Huah,

Arsat

2023

Adv Agric Food Res J

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Rice is the second most-grown cereal crop and one of the important staple foods in Malaysia. Seasonal rodent attacks from a family of Rattus argentiventer have shortened rice production by up to 80%. Yet, the acoustical method in controlling rodent populations is one of the topics that have not been properly explored. Under the field study radius, this study aims to analyse the hearing range of R. argentiventer under a controlled environment. Knowing a rodent’s ability to hear is essential for evaluating whether human activities, especially in terms of noise pollution, have an impact on hearing and consequently on rodent behaviour. Thirteen subjects were randomly cage-caught in the paddy field and were tested in a reward-based go/no-go procedure. Fully trained subjects were observed after acoustically exposing the subjects to a 10 kHz of pure tone less than 60 dB SPL for 25 sessions. Hearing range analysis commenced by revealing a pure tone to the fully trained subjects at low (1 kHz – 5 kHz), median (10 kHz – 40 kHz) and high (45 kHz – 80 kHz) frequencies. The results showed the subjects have sensitive frequencies at 5 kHz for low frequency, the median frequency at 25 kHz and high frequency at 45 kHz. From the sensitivity hearing results, it can be indicated that the hearing range of R. argentiventer is between 1 kHz to 55 kHz at sound levels of 60 dB. The results responded to the lack of timely response which is within an average of 5 sec and the minimum licking period at an average of 13 sec as the inaudible cut-off hearing range.

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Ears and Pinna

Cited by 2 publications

References 28 publications

An extraskeletal osteosarcoma in the auricle of a Wistar Hannover rat

An extraskeletal osteosarcoma in the auricle of a Wistar Hannover rat

Hearing Range Analysis of Rattus Argentiventer the Paddy Field Pest

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