MyMedR

Morphological characteristics of Pinna bicolor Gmelin and Pinna deltodes Menke from the seagrass bed of Sungai Pulai, Johor, Peninsular Malaysia

Mohd Hanafi Idris, Aziz Arshad, Japar Sidik Bujang, Mazlan Abd. Ghaffar, Siti Khalijah Daud

Sains Malaysiana, 2009;38.

Samples of Pinna bicolor Gmelin and Pinna deltodes Menke were collected from the seagrass bed of Sungai Pulai, covering Merambong shoal, Tanjung Adang shoal and Merambong Island off south western coast of Johor, Malaysia for morphological study from August 2005 to June 2006. It was observed that P. deltodes is associated with hard substratum and P. bicolor is associated with soft substratum in the study area. Physically there was no difference between P. bicolor and P. deltodes. The species were identified on the basis of nine internal and external characteristics of the valves. The two species were found to be morphologically different on the basis of width of sulcus, distance between posterior adductor muscle to posterior dorsal nacreous layer, dorsal posterior margin length and shell width.

Matched MeSH terms: Ear Auricle

Asplenium merapohense (Aspleniaceae), a new species from the Peninsular Malaysia

Jaman R, Kamin I, Kiew R

PhytoKeys, 2017.

PMID: 29118651 DOI: 10.3897/phytokeys.89.20875

A new species of Asplenium is described from two collections made on limestone hills in Peninsular Malaysia. Conspicuous by its extremely narrow pinnae, it is probably allied to A. salignum but differs in sufficient characters (scale size, size and shape of lamina, venation and sorus length, position and orientation) to be a species in its own right.

Matched MeSH terms: Ear Auricle

Syringomyelia / bulbia presenting as anhidrosis

Choy, Yew Sing, Sinniah, D.

Malaysian Journal of Child Health, 1992;4(1):6-12.

MyJurnal

Reported is the first case of syringomyelia and syringobulbia associated with Arnold Chiari I malformation in a Malaysian child. The initial complaint was that of unilateral anhidrosis of the face. The chief presenting features were dissociated sensory loss, asymmetrical weakness of the left upper limb associated with subluxation of left shoulder and signs of upper motor neurone lesion in the left lower limb. One unusual feature was the presence of vesiculation followed by ulceration of the pinnae of both ears. Magnetic resonance imaging (MRI) of the posterior fossa and cervical and thoracic cord facilitated the diagnosis and was the most useful diagnostic procedure in this child.

Matched MeSH terms: Ear Auricle

Formation of tissue engineered composite construct of cartilage and skin using high density polyethylene as inner scaffold in the shape of human helix

Ruszymah BH, Chua KH, Mazlyzam AL, Aminuddin BS

Int J Pediatr Otorhinolaryngol, 2011 Jun;75(6):805-10.

PMID: 21481479 DOI: 10.1016/j.ijporl.2011.03.012

Formation of external ear via tissue engineering has created interest amongst surgeons as an alternative for ear reconstruction in congenital microtia.

Matched MeSH terms: Ear Auricle*

Fulltext A Novel Use of Modified Tracheostomy Tubes in Preventing External Auditory Canal Stenosis

Ng CS, Foong SK, Loong SP, Ong CA, Hashim ND

J Int Adv Otol, 2021 Jul;17(4):301-305.

PMID: 34309549 DOI: 10.5152/iao.2021.0078

BACKGROUND: Postoperative or post-traumatic canal restenosis in patients with external auditory canal (EAC) stenosis is a troublesome complication faced by many ear surgeons following canalplasty or meatoplasty. Many ear prostheses and surgical methods have been introduced to prevent the occurrence of such complication. Our aim in this study is to explore the feasibility of using modified non-fenestrated uncuffed tracheostomy tubes (TT) as postoperative stents after ear canal surgery.

METHODS: Canalplasty or meatoplasty was performed under general anesthesia via the posterior auricular transcanal approach. The EAC diameter and length were measured and a non-fenestrated uncuffed TT of suitable size was fitted into the ear canal. The TT was then modified during fitting, to fit onto the concha. Patients were advised on the importance of compliance. The adequacy of the size of the EAC after the surgery was assessed during follow-ups.

RESULTS: A total of 3 patients (4 ears) were included in our study. Various sizes of TTs were fitted into their EAC following canalplasty or meatoplasty. All of them showed excellent postoperative outcome on follow up 2 years after the surgery, with no evidence of postoperative EAC stenosis.

CONCLUSION: Modified TT stent after canalplasty or meatoplasty is proposed as an excellent alternative in preventing restenosis of EAC in centers with limited resources.

Matched MeSH terms: Ear Auricle

Numbness of the ear following inferior alveolar nerve block: the forgotten complication

Ngeow WC, Chai WL

Br Dent J, 2009 Jul 11;207(1):19-21.

PMID: 19590550 DOI: 10.1038/sj.bdj.2009.559

This article presents a distant complication in the auricle following the administration of a standard inferior alveolar nerve block. The patient experienced profound numbness of the auricle on the ipsilateral side of the injection that lasted for about an hour following unintended injection to the auriculotemporal nerve.

Matched MeSH terms: Ear Auricle/innervation*

Fulltext Gap-induced inhibition of the post-auricular muscle response in humans and guinea pigs

Wilson CA, Berger JI, de Boer J, Sereda M, Palmer AR, Hall DA, et al.

Hear Res, 2019 03 15;374:13-23.

PMID: 30685571 DOI: 10.1016/j.heares.2019.01.009

A common method for measuring changes in temporal processing sensitivity in both humans and animals makes use of GaP-induced Inhibition of the Acoustic Startle (GPIAS). It is also the basis of a common method for detecting tinnitus in rodents. However, the link to tinnitus has not been properly established because GPIAS has not yet been used to objectively demonstrate tinnitus in humans. In guinea pigs, the Preyer (ear flick) myogenic reflex is an established method for measuring the acoustic startle for the GPIAS test, while in humans, it is the eye-blink reflex. Yet, humans have a vestigial remnant of the Preyer reflex, which can be detected by measuring skin surface potentials associated with the Post-Auricular Muscle Response (PAMR). A similar electrical potential can be measured in guinea pigs and we aimed to show that the PAMR could be used to demonstrate GPIAS in both species. In guinea pigs, we compare the GPIAS measured using the pinna movement of the Preyer reflex and the electrical potential of the PAMR to demonstrate that the two are at least equivalent. In humans, we establish for the first time that the PAMR provides a reliable way of measuring GPIAS that is a pure acoustic alternative to the multimodal eye-blink reflex. Further exploratory tests showed that while eye gaze position influenced the size of the PAMR response, it did not change the degree of GPIAS. Our findings confirm that the PAMR is a sensitive method for measuring GPIAS and suggest that it may allow direct comparison of temporal processing between humans and animals and may provide a basis for an objective test of tinnitus.

Matched MeSH terms: Ear Auricle/physiology*

Displaying all 7 publications