The reflex triggered by the stretching of the thigh extensor muscle is the patellar reflex.
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The withdrawal reflex is a spinal reflex that ensures moving away from potentially damaging stimuli.
The spinal cord is the part of the central nervous system running inside the spinal column from which spinal nerves branch out.
The knee joint is made up by the femur, the tibia and the kneecap.
The central nervous system consists of the brain and the spinal cord, the peripheral nervous system consists of nerves and ganglia.
Neurons are cells specialised for transmitting electric signals.
Bones of the upper limbs form the pectoral girdle and the arms.
Skeletal muscles form the active part of the locomotor system: they move the bones they are attached to.
The skin is the soft outer covering of our body, its three layers are the epidermis, the dermis and the hypodermis.
Scoliosis is a medical condition in which a person's spine has a lateral deviation.
The arms are moved by flexor and extensor muscles.
The main parts of the human brain are the brain stem, the cerebellum, the diencephalon, and the cerebrum, which is divided into lobes.
Neurons transmit electrical signals via chemical and electrical synapses.
The ear converts the vibrations of air into electric signals which are then processed by the brain.
The main parts of the human brain are the brain stem, the cerebellum, the diencephalon, and the cerebrum.
The two main parts of the central nervous system, the brain and the spinal cord are protected by the skull and the spinal column.
Human bones are joined together by cartilaginous or synovial joints, sutures or they can fuse together.
Synovial joints can be categorised by the direction of movement they allow.
Bones of the lower limbs are connected to the trunk by the pelvis.
The three types of muscle found in the human body are the smooth, the striated and the cardiac muscle.
This animation demonstrates the fine molecular structure and mechanism of muscles.