Simulation and Identification of the Neck Muscle Activities During Head and Neck Flexion Whiplash

2002 ◽  
Author(s):  
Yih-Charng Deng ◽  
Joanne Fu
Keyword(s):  
Head And Neck ◽  
Neck Muscle ◽  
Neck Flexion

Effect of neck flexion angles on neck muscle activity among smartphone users with and without neck pain

Ergonomics ◽  
2019 ◽  
Vol 62 (12) ◽  
pp. 1524-1533 ◽  
Author(s):  
Suwalee Namwongsa ◽  
Rungthip Puntumetakul ◽  
Manida Swangnetr Neubert ◽  
Rose Boucaut
Keyword(s):  
Neck Pain ◽  
Muscle Activity ◽  
Neck Muscle ◽  
Neck Flexion

Impact of posterior deep neck muscle treatment on cervical dystonia: Necessity to differentiate between abnormal positions of head and neck

Basal Ganglia ◽  
2012 ◽  
Vol 2 (2) ◽  
pp. 103-107 ◽  
Author(s):  
Harald Hefter ◽  
Ulrike Kahlen ◽  
Till R. Menge ◽  
Dietmar Rosenthal ◽  
Marek Moll
Keyword(s):  
Head And Neck ◽  
Cervical Dystonia ◽  
Neck Muscle

scholarly journals Influence of Head and Neck Muscle Contraction on Tinnitus

2014 ◽  
Vol 57 (2) ◽  
pp. 84
Author(s):  
Sang Hoon Kim ◽  
Tae Hyun Kim ◽  
Chul Won Yang ◽  
Sun A Choi ◽  
Seung Geun Yeo ◽  
...  
Keyword(s):  
Muscle Contraction ◽  
Head And Neck ◽  
Neck Muscle

scholarly journals Biomechanical modeling of neck flexion for deformable alignment of the salivary glands in head and neck cancer images

2019 ◽  
Vol 64 (17) ◽  
pp. 175018
Author(s):  
Molly M McCulloch ◽  
Brian M Anderson ◽  
Guillaume Cazoulat ◽  
Christine B Peterson ◽  
Abdallah S R Mohamed ◽  
...  
Keyword(s):  
Head And Neck Cancer ◽  
Head And Neck ◽  
Salivary Glands ◽  
Neck Cancer ◽  
Biomechanical Modeling ◽  
Neck Flexion

Neck afferents and muscle sympathetic activity in humans: implications for the vestibulosympathetic reflex

1998 ◽  
Vol 84 (2) ◽  
pp. 450-453 ◽  
Author(s):  
Chester A. Ray ◽  
Keith M. Hume
Keyword(s):  
Heart Rate ◽  
Vestibular System ◽  
Sympathetic Activity ◽  
Head Rotation ◽  
Muscle Afferents ◽  
Neck Muscle ◽  
Neck Flexion ◽  
Vestibulosympathetic Reflex ◽  
Neck Afferents ◽  
Neck Muscle Afferents

Ray, Chester A., and Keith M. Hume. Neck afferents and muscle sympathetic activity in humans: implications for the vestibulosympathetic reflex. J. Appl. Physiol. 84(2): 450–453, 1998.—We have shown previously that head-down neck flexion (HDNF) in humans elicits increases in muscle sympathetic nerve activity (MSNA). The purpose of this study was to determine the effect of neck muscle afferents on MSNA. We studied this question by measuring MSNA before and after head rotation that would activate neck muscle afferents but not the vestibular system (i.e., no stimulation of the otolith organs or semicircular canals). After a 3-min baseline period with the head in the normal erect position, subjects rotated their head to the side (∼90°) and maintained this position for 3 min. Head rotation was performed by the subjects in both the prone ( n = 5) and sitting ( n = 6) positions. Head rotation did not elicit changes in MSNA. Average MSNA, expressed as burst frequency and total activity, was 13 ± 1 and 13 ± 1 bursts/min and 146 ± 34 and 132 ± 27 units/min during baseline and head rotation, respectively. There were no significant changes in calf blood flow (2.6 ± 0.3 to 2.5 ± 0.3 ml ⋅ 100 ml−1 ⋅ min−1; n = 8) and calf vascular resistance (39 ± 4 to 41 ± 4 units; n = 8). Heart rate (64 ± 3 to 66 ± 3 beats/min; P = 0.058) and mean arterial pressure (90 ± 3 to 93 ± 3; P < 0.05) increased slightly during head rotation. Additional neck flexion studies were performed with subjects lying on their side ( n = 5). MSNA, heart rate, and mean arterial pressure were unchanged during this maneuver, which also does not engage the vestibular system. HDNF was tested in 9 of the 13 subjects. MSNA was significantly increased by 79 ± 12% ( P < 0.001) during HDNF. These findings indicate that neck afferents activated by horizontal neck rotation or flexion in the absence of significant force development do not elicit changes in MSNA. These findings support the concept that HDNF increases MSNA by the activation of the vestibular system.

scholarly journals Alterations in Endotracheal Tube Position during General Anaesthesia

1994 ◽  
Vol 22 (5) ◽  
pp. 586-588 ◽  
Author(s):  
S. J. Yap ◽  
R. W. Morris ◽  
D. A. Pybus
Keyword(s):  
Endotracheal Tube ◽  
Head And Neck ◽  
Elective Surgery ◽  
Neck Flexion ◽  
Postural Change ◽  
Neck Movement ◽  
Neck Extension ◽  
Tube Position ◽  
Neck Rotation ◽  
Flexion And Extension

The effect of head and neck movement and Trendelenburg tilt on endotracheal tube position, relative to the carina, was studied in fifty adult patients requiring intubation for elective surgery. On average, inward movement, that is shortening of the distance between the endotracheal tube tip and the carina, resulted from neck flexion (mean = −5.5 mm), whereas outward movement occurred with neck extension (mean = 6.3 mm). Neck rotation, to right and left, and Trendelenburg tilt did not show any trend towards inward nor outward movement (mean = 0.3 mm/1.7 mm/—0.6 mm, respectively). Whilst these mean positional changes for flexion and extension confirm the findings of earlier investigations, our range of maximum inward and outward displacement for flexion (23 mm in/19 mm out), extension (21 mm in/33 mm out), rotation to right (19 mm in/17 mm out), to left (22 mm in/19 mm out) and Trendelenburg tilt (22 mm in/16 mm out) indicate that for any given postural change in any one patient, the direction and magnitude of endotracheal tube displacement is not readily predictable.

Upper airway extraluminal tissue pressure fluctuations during breathing in rabbits

2003 ◽  
Vol 95 (4) ◽  
pp. 1560-1566 ◽  
Author(s):  
Kristina Kairaitis ◽  
Radha Parikh ◽  
Rosie Stavrinou ◽  
Sarah Garlick ◽  
Jason P. Kirkness ◽  
...  
Keyword(s):  
Tidal Volume ◽  
Head And Neck ◽  
Pressure Transducer ◽  
Upper Airway ◽  
Neck Flexion ◽  
Tissue Pressure ◽  
Pharyngeal Wall ◽  
Neck Position ◽  
Resistive Loading ◽  
Head And Neck Position

Transmural pressure at any level in the upper airway is dependent on the difference between intraluminal airway and extraluminal tissue pressure (ETP). We hypothesized that ETP would be influenced by topography, head and neck position, resistive loading, and stimulated breathing. Twenty-eight male, New Zealand White, anesthetized, spontaneously breathing rabbits breathed via a face mask with attached pneumotachograph to measure airflow and pressure transducer to monitor mask pressure. Tidal volume was measured via integration of the airflow signal. ETP was measured with a pressure transducer-tipped catheter inserted in the tissues of the lateral (ETPlat, n = 28) and anterior (ETPant, n = 21) pharyngeal wall. Head position was controlled at 30, 50, or 70°, and the effect of addition of an external resistor, brief occlusion, or stimulated breathing was examined. Mean ETPlat was ∼0.7 cmH2O greater than mean ETPant when adjusted for degree of head and neck flexion ( P < 0.05). Mean, maximum, and minimum ETP values increased significantly by 0.7-0.8 cmH2O/20° of head and neck flexion when adjusted for site of measurement ( P < 0.0001). The main effect of resistive loading and occlusion was an increase in the change in ETPlat (maximum - minimum ETPlat) and change in ETPant at all head and neck positions ( P < 0.05). Mean ETPlat and ETPant increased with increasing tidal volume at head and neck position of 30° (all P < 0.05). In conclusion, ETP was nonhomogeneously distributed around the upper airway and increased with both increasing head and neck flexion and increasing tidal volume. Brief airway occlusion increased the size of respiratory-related ETP fluctuations in upper airway ETP.

Head and Neck Muscle Evolution from Sarcopterygian Fishes to Tetrapods, with a Special Focus on Mammals

2018 ◽  
pp. 121-228 ◽  
Author(s):  
Rui Diogo ◽  
Janine M. Ziermann ◽  
Julia Molnar ◽  
Natalia Siomava ◽  
Virginia Abdala
Keyword(s):  
Head And Neck ◽  
Special Focus ◽  
Neck Muscle ◽  
Muscle Evolution
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