Fig. 5From: Ceasing of muscle function with aging: is it the consequence of intrinsic muscle degeneration or a secondary effect of neuronal impairments?Transmission electron micrograph from a longitudinal section of the vastus lateralis muscle of a 68-year-old man, showing a muscle fibre containing condensed mitochondria of small size and the interstitial space enriched with collagen fibres (original magnification: 24,000×)Back to article page