pectoral muscles

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pectoral muscles

The group of muscles, consisting of the pectoralis major and minor on either side, covering the upper ribs on either side of the front of the chest. The pectoral muscles help to control the shoulder-blade (scapula) and, through it, to move the arm forward and down, and, acting directly on the arm, to pull it towards the body.
Figure 1: Efferent nerve pathways from the brainstem and spinal cord. Shown on the right: somatic, to skeletal muscles. Shown on the left: autonomic. B brain stem, C cervical, T thoracic, L lumbar, S sacral segments of the spinal cord. (Red shaded regions are those with no autonomic outflow.)

pectoral muscles

group of muscles on the front of the chest which link the trunk to the upper limb. pectoralis major the largest and most superficial, takes origin from the clavicle, sternum and ribs and crosses the front of the shoulder to insertions into the clavicle and humerus. See Figure 1.

pectoral

1. of or pertaining to the chest.
2. relieving disorders of the respiratory tract, as an expectorant.

pectoral girdle
in birds is the three pairs of bones that support the wings: the furculae (fused clavicles), coracoids and scapulae. In mammals the coracoids and clavicles are often reduced, making the girdle incomplete.
pectoral limb
the forelimb.
pectoral muscles
extrinsic muscles of the forelimb arising from the brisket (ventral chest). See also Table 13. Outbreaks of defective development of these muscles are recorded in cattle.
pectoral myopathy
a meat hygiene term for the lesions found in turkey and meat chicken breasts causing rejection of the meat. Called also green muscle disease.
References in periodicals archive ?
Pectoralis muscle--The majority of pectoralis muscles do not show enhancement on subtracted images.
13] Upper Crossed Syndrome is characterised by the hypertonic upper trapezius, levator scapulae, and pectoralis muscles, as well as inhibition of the deep cervical flexors, rhomboids, and serratus anterior, which may affect scapulothoracic joint movement.
Rounded upper back with tight traps and pectoralis muscles.
The pectoralis muscles were collected from ED 12 embryos into phosphate-buffered saline (PBS).
Chest computed tomography scan revealed a large, well-enhanced mass in the left breast without invasion to the skin or pectoralis muscles and also enlarged left axillary lymph nodes (Figure 1).
It is assumed that the aplasia of the pectoralis muscles and associated chest defects as the athelia aplasia of costal cartilages are consequences of an interruption of early embryonic blood supply of subclavicular artery branches.
This leads to a dominance of the anterior deltoid and pectoralis muscles and a relative weakening of the rotator cuff in rear-shoulder girdle muscles.
The plexus lies beneath the pectoralis muscles, the thickness of which is palpated when the axillary pulse is felt, indicating the depth at which the plexus lies.
Strength training of the pectoralis muscles (the muscles under your breast) may provide additional support to help prevent drooping and will burn more calories.
All patients underwent a physical examination that included inspection for thoracic scoliosis, kyphosis, and pectus carinatum or excavatum; inspection of the cervical spine and shoulder movements; and palpation of the sternomastoid, trapezius, and pectoralis muscles.
The right side of his chest had singed hair, a healing burn injury, and damage to the underlying pectoralis muscles.
However, there was a substantial amount of electrical activity in the clavicular portion of the pectoralis muscles and some suggestion of activity in the latissimus dorsi or teres major muscles.