ABSTRACT
Electromyographic activity and the electrocardiogram were recorded during windsurfing on the water in six subjects (three females and three males). 'Beating' and 'reaching' (both with continuous pumping), 'running' and 'uphauling' were performed in light to moderate winds. The physiological signals were transmitted to a shore base by radio telemetry and recorded with synchronized video and audio information of movement. Heart rates were similar for the beating, reaching and running activities within the individuals, but varied between individuals (means of 145 to 173 beats min-1), due to performance conditions and related muscle activity levels. During beating and reaching, the trapezius, flexor carpi ulnaris, extensor carpi radialis, biceps brachii and tibialis anterior were very active, with the gluteus maximus being particularly important in beating. Running involved less general muscle activity, though the role of the tibialis anterior increased. Differences in technique were identified between the subjects, notably in the order of muscle recruitment to participate in the activities.
Subject(s)
Muscle, Skeletal/physiology , Sports/physiology , Electromyography , Female , Heart Rate , Humans , MaleABSTRACT
Whilst it is to be appreciated that a neurilemmoma is an uncommon type of tumour, it is a diagnostic possibility which must be considered whe one is faced with the management of a patient with a mass involving any part of the head and neck. It should be stressed that the diagnosis is not usually evident after extensive clinical and special investigations but is usually made retrospectively after histological examination of the excised surgical specimen.
Subject(s)
Head and Neck Neoplasms/diagnosis , Neurilemmoma/diagnosis , Adult , Diagnosis, Differential , Female , Humans , Laryngeal Neoplasms/diagnosis , Male , Maxillary Neoplasms/diagnosis , Middle Aged , Nasal Cavity , Nasopharyngeal Neoplasms/diagnosis , Neurofibroma/diagnosis , Nose Neoplasms/diagnosis , Paranasal Sinus Neoplasms/diagnosis , Pharyngeal Neoplasms/diagnosisABSTRACT
The authors investigated 31 patients suffering from benign and malignant lesions of the paranasal sinuses. Clinical, conventional radiological methods and computed tomography were used. In benign lesions CT added little significant information to that obtained by conventional radiological methods. In malignant lesions, however, CT provides additional valuable information. It gives a clear picture of the posterior, superior and orbital extent of paranasal tumours. It also shows the extent of the tumour into the infratemporal fossa.
