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Functional compartments of the tensor veli palatini muscle.
Arch Otolaryngol Head Neck Surg. 1994 Dec; 120(12):1382-9.AO

Abstract

OBJECTIVE

To evaluate a dual role for the tensor veli palatini muscle in tubal and palatal function.

MATERIALS AND METHODS

The eustachian tube region of guinea pigs and macaques was fixed and processed for analysis by serial section histologic examination, micro-dissection, or both. The attachment, fiber direction, and regional relations of potentially discrete functional compartments in eustachian tube muscles were noted.

RESULTS

The tensor veli palatini muscle in macaques has two anatomic sub-bellies. One appears to be a tubal dilator, the other to make the tube rigid along its longitudinal axis. No other muscle is directly associated with the eustachian tube in macaques. The tensor veli palatini muscle in guinea pigs has one gross belly that may affect palatal tensing and tubal dilation, rigidification, and stabilization. Other muscles of the eustachian tube in guinea pigs are a medial sub-belly of the medial pterygoid muscle, not previously described, and the levator veli palatini muscle.

CONCLUSIONS

The muscular elements underlying tubal-palatal function in guinea pigs are more distinct and spatially separated than in macaques or humans. These differences may explain the confusion about the role of accessory muscles in tubal function. Muscular compartments of the eustachian tube complex in guinea pigs are easily accessible, which facilitates a more discrete and confident placement of electromyography electrodes. The guinea pig may be a useful model to better understand the interaction of multilevel compartmentalized physiologic sequences that underlie coordination of swallowing, breathing, and middle ear aeration.

Authors+Show Affiliations

Department of Otolaryngology, Mount Sinai School of Medicine, New York, NY.No affiliation info availableNo affiliation info available

Pub Type(s)

Comparative Study
Journal Article

Language

eng

PubMed ID

7980905

Citation

Gannon, P J., et al. "Functional Compartments of the Tensor Veli Palatini Muscle." Archives of Otolaryngology--head & Neck Surgery, vol. 120, no. 12, 1994, pp. 1382-9.
Gannon PJ, Eden AR, Laitman JT. Functional compartments of the tensor veli palatini muscle. Arch Otolaryngol Head Neck Surg. 1994;120(12):1382-9.
Gannon, P. J., Eden, A. R., & Laitman, J. T. (1994). Functional compartments of the tensor veli palatini muscle. Archives of Otolaryngology--head & Neck Surgery, 120(12), 1382-9.
Gannon PJ, Eden AR, Laitman JT. Functional Compartments of the Tensor Veli Palatini Muscle. Arch Otolaryngol Head Neck Surg. 1994;120(12):1382-9. PubMed PMID: 7980905.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Functional compartments of the tensor veli palatini muscle. AU - Gannon,P J, AU - Eden,A R, AU - Laitman,J T, PY - 1994/12/1/pubmed PY - 1994/12/1/medline PY - 1994/12/1/entrez SP - 1382 EP - 9 JF - Archives of otolaryngology--head & neck surgery JO - Arch Otolaryngol Head Neck Surg VL - 120 IS - 12 N2 - OBJECTIVE: To evaluate a dual role for the tensor veli palatini muscle in tubal and palatal function. MATERIALS AND METHODS: The eustachian tube region of guinea pigs and macaques was fixed and processed for analysis by serial section histologic examination, micro-dissection, or both. The attachment, fiber direction, and regional relations of potentially discrete functional compartments in eustachian tube muscles were noted. RESULTS: The tensor veli palatini muscle in macaques has two anatomic sub-bellies. One appears to be a tubal dilator, the other to make the tube rigid along its longitudinal axis. No other muscle is directly associated with the eustachian tube in macaques. The tensor veli palatini muscle in guinea pigs has one gross belly that may affect palatal tensing and tubal dilation, rigidification, and stabilization. Other muscles of the eustachian tube in guinea pigs are a medial sub-belly of the medial pterygoid muscle, not previously described, and the levator veli palatini muscle. CONCLUSIONS: The muscular elements underlying tubal-palatal function in guinea pigs are more distinct and spatially separated than in macaques or humans. These differences may explain the confusion about the role of accessory muscles in tubal function. Muscular compartments of the eustachian tube complex in guinea pigs are easily accessible, which facilitates a more discrete and confident placement of electromyography electrodes. The guinea pig may be a useful model to better understand the interaction of multilevel compartmentalized physiologic sequences that underlie coordination of swallowing, breathing, and middle ear aeration. SN - 0886-4470 UR - https://www.unboundmedicine.com/medline/citation/7980905/Functional_compartments_of_the_tensor_veli_palatini_muscle_ DB - PRIME DP - Unbound Medicine ER -